Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which of the following is not a mixture?
Sugar Syrup
Lime water
Ice
Soil
The molecular formula of phosphorous is
P1
P2
P3
P4
In a chemical reaction, 28 g of carbon monoxide react completely with 16 g of oxygen gas to form 44 g of carbon dioxide. A particular law of chemical combination is being followed in this reaction. Which postulate of Dalton's Theory can explain the law being followed in the above reaction?
The relative number and kind of atoms are constant in a given compound.
Atoms can neither be created nor destroyed in chemical reaction.
Atoms of different elements have different masses.
Atoms combine in small whole number ratios to form compounds.
A mixture of salt and sugar can be considered as
Homogeneous mixture
Heterogeneous mixture
Mixture of Components
None of the above
Which one of the following is a balanced chemical equation?
N2 + H2 → NH3
CH4 + O2 → CO2 + H2O
Fe2O3 + C → Fe + CO2
2Mg + O2 → 2MgO
Consider the following laws
I) Law of Conservation of Mass
II) Law of Definite Proportions
III) Law of Multiple Proportions
Which of these governs the quantitative aspects of chemical changes?
I only
II and III
I and II
All of the Above
The formula which represents the simple ratio of atoms in a compound is called -
Rational formula
Molecular formula
Structural formula
Empirical formula
Which of the following salts has no water of crystallization ?
Blue vitriol
Washing soda
Gypsum
Baking soda
What is the stoichiometric coefficient of Ca in the reaction Ca + Al3+ → Ca^2+ + Al
2
1
3
4
Thermal decomposition of lime stone produces
Quick lime
Marble
Slaked lime
