GK

Q. Brass gets discolored in air due to the presence of which gas in air ....?

1. Nitrogen
2. Hydrogen Sulphide
3. Oxygen
4. Carbon Dioxide

Ans. [2]

Q. Which of the following ores does not contains iron ?

1. Casseterite
2. Limonite
3. Magnetite
4. Haematite

Ans. [1]


Q. ? The Study of Phenomena at very low temperature is called...?

1. Heat Transfer
2. Morphology
3. Crystallography
4. Cryogenics

Ans. [4]

Q. Co-operative Credit Society Act was passed in India in ..?

1. 1902
2. 1912
3. 1904
4. 1906

Ans. [2]