1.Which of the following chemicals is used in photography?
A. silver bromide
B. aluminium hydroxide
C. sodium chloride
D. potassium nitrate
A.Butyl Alcohol
B. Ethyl Alcohol
C. Propyl Alcohol
D. Methyl Alcohol
3.Name the gas used for making vegetable ghee.
A.Nitrogen
B.Oxygen
C.Sulphur
D.Hydrogen
4.Which of the following gases finds its application in extinguishing fire?
A.carbon monoxide
B.oxygen
C.carbon dioxide
D.all of the above
5.What is the chemical name of a substance which kills rats?
A.White phosphorus
B.Red phosphorus
C.Potassium cyanide
D.Ethyl Alcohol
6.The boiling point of water can be raised by
A.reducing pressure
B.increasing pressure
C.reducing heat supply
D.increasing heat supply
7.Which of the following regulates the quantum of light entering the human eye?
A.Cornea
B.Iris
C.Retina
D.None of the above
8.The chief value of perspiration is that it
A.eliminates body odour
B.improves the general health
C.opens the pores in the skin
D.regulates body temperature
9.Which of the following is rich in all the three foods – carbohydrates, proteins and fats?
A.Rice grains
B.Soyabean seeds
C.Mango fruit
D.Cabbage leaves
10.Which of the following diseases is caused by a virus?
A.Diabetes
B.Malaria
C.Smallpox
D.Tuberculosis
ANSWER KEY:
1 – (A)
2 – (B)
3 – (D)
4 – (A)
5 – (A)
6 – (B)
7 – (B)
8 – (D)
9 – (B)
10 -(C)
