IMPORTANT QUESTIONS ANSWER FOR UPCOMING GOVERNMENT EXAM

1) Brass gets discoloured in air because of the presence of which of the following gases in air?
A) Oxygen
B) Hydrogen sulphide
C) Carbon dioxide
D) Nitrogen

Ans: Hydrogen sulphide

2) Bromine is a
A) black solid
B) red liquid
C) colourless gas
D) highly inflammable gas

Ans: red liquid

3) Isotopes are separated by
A) crystallisation
B) sublimation
C) distillation
D) filtration

C) distillation

4) The isotope of uranium capable of sustaining chain reaction is
A) U-235
B) U-245
C) U-239
D) U-238

Ans: U-235

5) The age of most ancient geological formations is estimated by
A) Ra - Si method
B) Potassium - argon method
C) C14 method
D) Uranium - lead method

Ans: Uranium - lead method


6) Which of the following rays are more penetrating?
A) Beta rays
B) Alpha rays
C) Gamma rays
D) X-rays

Ans: Gamma rays

7) How many colours the sunlight spectrum has?
A) Three
B) Seven
C) Four
D) Five

Ans: Seven

8) Reading of a barometer going down is an indication of
A) snow
B) storm
C) intense heat
D) rainfall

Ans: rainfall

9) Fathom is the unit of
A) sound
B) depth
C) frequency
D) distance

Ans: depth

10) A chronometer measures
A) colour contrast
B) sound waves
C) time
D) water waves

Ans: time

11) Which type of fire extinguisher is used for petroleum fire?
A) Powder type
B) Liquid type
C) Soda acid type
D) Foam type

Ans: Powder type

12) What is the name of a group of similar cells performing a specific function?
A) Tissue
B) Organ
C) Organ system
D) Cellular organization

Ans: Tissue

13) Blood circulation was discovered by?
A) Mary Anderson
B) Virginia Apgar
C) William Harvey
D) Robert Feulgen

Ans: William Harvey

14) Detergents used for cleaning clothes and utensils contain?
A) bicarbonates
B) bismuthates
C) sulphonates
D) nitrates

Ans: sulphonates

15) The most important ore of aluminium is
A) galena
B) calamine
C) calcite
D) bauxite

Ans: bauxite