Objective General Knowledge

Q. Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is:
1 acetic acid
2 methanoic acid
3 hydrochloric acid
4 citric acid
Ans: 3
Q. When concentrated H2SO4 spills on the surface, it should be immediately cleaned:
1 with a piece of cloth
2 by adding cold water
3 by adding solid Na2Co3
4 by adding solid BaCl2
Ans: 3
Q. A bee-sting leaves an acid which causes pain and irritation. The injected acid is:
1 acetic acid
2 sulphuric acid
3 citric acid
4 methanoic acid
Ans: 4
Q. Iron nails are dipped into blue copper sulphate solution. After some time iron nails are:
1 dissolved and blue colour is discharged
2 discharged but blue colour is not discharged
3 not dissolved and blue colour is not discharged
4 not dissolved but blue colour is discharged
Ans: 4
Q. A student by chance mixed acetone with alcohol. This mixture of acetone and alcohol can be separated by:
1 filtration
2 separating funnel
3 Fractional crystallisation
4 fractional distillation
Ans: 4
Q. Silver ware turns black after a period of time due to information of:
1 nitrate coating on silver
2 sulphide coating on silver
3 chloride coating on silver
4 oxide coating on silver
Ans: 2
Q. Which of the statements given below is/are correct?
1. chloride of calcium
2. bicarbonate of calcium
3. sulphate of magnesium
4. bicarbonate of magnesium
Select the correct answer using the code given below:
1 1 and 3 only
2 1 only
3 2 and 4
4 1, 2 and 3
Ans: 1
Q. Which of the following statements about diamond are correct?
1. It is used as a gem in jewellery because of its ability to reflect light.
2. It is a good conductor of electricity
3. It is used for cutting glass, marble stones and other hard materials
4. It is used for drilling of rocks
Select the correct answer using the code given below:
1 1, 3 and 4
2 2, 3 and 4
3 1, 2 and 3
4 2 and 4 only
Ans: 1
Q. Which one among the following methods is not effective in removing arsenic from contaminated ground water?
1 Boiling
2 Reverse osmosis
3 Ton exchange
4 Coagulation-adsorption
Ans: 1
Q. Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper containing alloys, yet they differ in their chemical composition for additionally containing:
1 Zinc in brass and tin in bronze
2 Chromium in brass and nickel in bronze
3 Nickel in brass and tin in bronze
4 Iron in brass and nickel in bronze
Ans: 1