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
Who among the following was the head of the Government that was overthrown by the Bolsheviks in the 1917 Revolution?
Alexander Kerensky
Prince Lvov
Grand Duke Sergei
Tsar Nicholas II
Hydrogenation of vegetable oils using nickel catalyst is an example of
Substitution reaction.
Elimination reaction
Addition reaction
Free-radical polymerization
Light waves are incident on an air-glass boundary, Same of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?
Speed
Direction
Brightness
Frequency
Which one of the following statements about dihydrogen (H2) is not correct?
H2 is lighter than air and insoluble in water.
H2 is inert at room temperature due to high H—H bond dissociation enthalpy.
H2 reacts with alkali metals at high temperature to yield metal hydrides.
A mixture of NO2 and H2 is known as Syngas.
If a ray of light enters from a rarer medium to a denser medium,at zero angles of incidence it would
reflect
Go straight
turn towards the right
bend at 45°
