Select the pairs of substances which on reaction will not evolve H₂ gas?

Match the following

Type                                 Reaction

a) Light is required           1) photochemical reaction

b) Light is evolved            2) Chemiluminiscent reaction

c) Electricity is required    3) Electrochemical reaction

d) Electricity is produced   4) Electrolytic reaction

Which of the following is an example of Endothermic reaction:

In the reaction between hydrogen sulphate ion and water
the water acts as

Consider the following chemical reaction:
aFe₂O₃(s) + bCO(g) → cFe(s) + dCO₂
In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?

Which of the following are the postulates of Dalton Atomic Theory?

Consider the following statements

1) Alkaline earth metals are less soluble than alkali metals

2) They have smaller atomic size and higher effective nuclear charge compared to alkali metals

The equivalent weight of  is given, atomic weight of Ba is 137.3

Which of the following statements are correct:

1) The ‘Periodic Table of Elements’ was written by Dmitri Mendeleev in 1869
2) The United Nations General Assembly has proclaimed 2020 as the International Year of the Periodic Table of Chemical Elements
Choose the correct statements:

Which one of the following elements is essential for the formation of chlorophyll in green plants?

consider the following

1) Gene regulation

2) Making protein in the cell

3) Facilitate DNA replication

Which of the following Functions, that not occurs in prokaryotic cells?

in which of the following period of time the first cell came into existence?

Which one of the following is the first enzyme to mix with food in the digestive tract?

Which of the following is used for digestion of food?

Kidney secretes an enzyme, which changes plasma protein angiotensinogen into angiotensin. The enzyme is

The agents which does not contribute to the propagation of plants through seed dispersal is

Consider the following statements:

Statement 1: plants grow through a combination of cell growth and cell division.

Statement 2: Apical meristems are found at the apex, or tip, of roots and buds.

Which one of the following is not an epidemic disease?

Mosquito can be a vector for following diseases except

The agents which does not contribute to the propagation of plants through seed dispersal is

Which of the given particles will describe the smallest circle when projected with the same velocity perpendicular to a magnetic field?

The following question consists of statements of an Assertion and a Reason. Choose the correct option:

Assertion: As per Mendeleev, the periodic properties of elements depend on their atomic numbers.

Reason: Atomic number is equal to the number of protons.

Which of the following statement is correct when a semiconductor is doped with a donor impurity.

When 35 g of reactant AB breaks down into 10 g of product A and x g of product B. Calculate the weight of product B by using the law of conservation of mass.

Which of the statements given below about Mars 2020 Mission — Perseverance Rover is/are correct?

1) Perseverance Rover has been launched by Russian Space agency in search of ancient life and to gather samples of rocks and soils from the red planet on 30 July 2020

2) It is scheduled to land on 18 February 2021 and the landing site will be Jezero crater on Mars.

3) The rover will explore the geologically diverse landing site and assess ancient habitability.

NASA’s Transiting Exoplanet Survey Satellite (TESS) completed its primary mission on 4 July 2020. As part of the two-yearlong survey, it captured nearly 75% of the giant starry sky and also found 66 New Exoplanets beyond our planetary system.

Which of the following statements with regards to Transiting Exoplanet Survey Satellite (TESS) is/are incorrect?

1) European Space Agency’s Transiting Exoplanet Survey Satellite (TESS) completed its primary mission on 4 July 2020

2) During its two-yearlong survey, Transiting Exoplanet Survey Satellite (TESS) captured nearly 75% of the giant starry sky and also found 66 New Exoplanets beyond our planetary system.

Which of the following statements with regards to Starlink Mission is/are incorrect?

1) It will provide High-speed Internet Access across the Globe

2) It was launched by NASA

Which of the following statements with regards to NEOWISE Comet is/are incorrect?

1) Comet C/2020 F3 NEOWISE (nicknamed comet NEOWISE) was discovered on 27 March by ISRO’s Near-Earth Object Widefield Infrared Survey Explorer (NEOWISE).

2) NEOWISE Comet is the Brightest Long-period Comet

Which of the following statements is/are incorrect?

1) A unique green glow was observed for the first time on Venus, the first ever observation on a planet other than earth.

2) Oxygen atoms are responsible for the appearance of a green glow in the Venus atmosphere.

Elements P, Q, R, S and T have atomic number 2, 3, 7, 10 and 30 respectively. Out of these which elements would belong to the same period?

Which of the following statements with regards to earth is/are correct?

1) Earth’s distance from the Sun permits an average temperature of 15 degree C, cosy for life to thrive and to make liquid water to be available on its surface.

2) Modern humans have been in existence on Earth for more than 200,000 years.

Which of the following statements is/are correct?

1) The Sun, the supporter of all the life on Earth, has a life span 1 billion years from now.

2) The dinosaurs and some other species, which roamed the Earth for 160 million years, were wiped out by an asteroid strike about 65.6 million years ago.

Which of the statements with regards to planets is/are correct?

1) Of all the rocky, solid planets of our solar system, Venus appears to be most suitable for an future human habitat as it is not too cold or too hot.

2) MAVEN spacecraft was launched by European Space Agency in 2014 to study the atmosphere of Venus.

3) Martian soil is rich in iron compounds, which give it a red hue.

Which of the statements with regards to terraforming is/are incorrect?

1) It is a new method to prevent the disastrous impact of climate change, so that goals of sustainable development can be achieved.

2) Terraforming involves releasing large quantities of heat-trapping greenhouse gases to raise the atmospheric pressure as well as the surface temperature.

Consider the following statements with regards to impact of microgravity present in space on the human body:

1) Microgravity of space can lead to loss of bone density and muscle mass, cardiac problems, low red blood cells, immunodeficiency.

2) If humans plan to settle on Mars on a long-term basis, there may not be any reproduction problems.

Which of the statements given above is/are correct?

Consider the following statements with regards to indigenous AI-based Cyber-physical System developed recently:

1) To monitor social distancing in public places, researchers at IIT Delhi have developed a low- cost Artificial Intelligence based cyber-physical system.

2) The device will give a proximity alert whenever there is a violation of social distancing norms.

3) The device uses images of a camera and computes the distance as per criterion set by the Ministry of Science and Technology, Government of India.

Which of the statements given above is/are correct?

Consider the following statements with regards to impact of COVID-19 Pandemic:

1) As people stopped commuting and travelling, and establishments and factories are closed, the Earth’s surface vibrated less, and seismologists tracked the change and noticed the seismic silence.

2) There is an enhanced ability to ‘listen’ to brewing volcanoes in seismically active regions and detect precursory changes in the Earth’s interior.

Which of the statements given above is/are incorrect?

Consider the following statements with regards to CIVILITY mask launched recently:

1) CIVILITY is a Transparent Mask developed by a team led by French engineer Pierre Blondon

2) It suits any type of face giving optimal airtight, high performance filters, replaceable filters, etc.

3) The only disadvantage with regards to CIVILITY is that difficult to clean and is quite costly.

Which of the statements given above is/are correct?

Identify the incorrect statements about Removable Surgical Tape adhesive released by MIT Recently:

1) MIT engineers have developed a double-sided surgical tape capable of quickly and firmly sticking to wet surfaces such as biological tissues.

2) The tape can be detached from the underlying tissue without causing any damage.

3) Removable Surgical Tape can be attached to external organs only

Mitochondria are able to produce their own

Which of the following are the postulates of Dalton Atomic Theory?

Consider the following statements

1) Alkaline earth metals are less soluble than alkali metals

2) They have smaller atomic size and higher effective nuclear charge compared to alkali metals

The potential energy(U) for a body of mass m at a height H from the ground given by the formula below:

Potential energy, U= mg h

Where m is the mass, g is the acceleration, and h is the height.

The dimensional formula for potential energy is _________.

Which of the following statements are correct:

1) The ‘Periodic Table of Elements’ was written by Dmitri Mendeleev in 1869
2) The United Nations General Assembly has proclaimed 2020 as the International Year of the Periodic Table of Chemical Elements
Choose the correct statements:

Which one of the following elements is essential for the formation of chlorophyll in green plants?

The agents which does not contribute to the propagation of plants through seed dispersal is

Consider the following statements:

Statement 1: plants grow through a combination of cell growth and cell division.

Statement 2: Apical meristems are found at the apex, or tip, of roots and buds.

Which was the principle plant used in Green Revolution?

Which of the following statement is/are correct about sexual reproduction in flowering plants.

1) The swollen bottom part of carpel is the ovary.

2) The fusion of germ cells gives rise to zygote.

3) Stamen is present in the centre of a flower.

4) Stamen produces pollen grains in the ovary.

Select the correct answer using the code given below.

The sceneries of all the hill station enchants the visitors a lot.