Heavy Metal Poisoning

Q.

What are the safety rules that are to be followed in a chemistry laboratory?

Q. Fluoride pollution mainly affects

1. Teeth
2. Brain
3. Heart
4. Kidney

Q.

Disease caused by eating fish found in water contaminated with the industrial waste of mercury:

1. Osteosclerosis

2. Minimata disease

3. Bright's disease

4. Hashimoto's disease

Q. Regarding the assertion and reason, select the right option.
Assertion [A]: Water scarcity has led to arsenic and fluoride contamination of water.
Reason [R]: As the water gets scarce, the concentration of minerals such as arsenic and fluoride increases.

1. Both A and R are correct and R explains A
2. Both A and R are correct and R does not explain A
3. A is correct and R is incorrect
4. Both A and R are incorrect

Q.

Accumulated heavy metals cannot be metabolised by organisms.

1. True
2. False

Q.

Which one of the following is not correct with regard to DDT?

1. Bacteria can undergo multiplication and DDT is degraded by living cells
2. Bacteria can be degraded by living cells and DDT cannot be degraded by living cells
3. Bacteria can undergo biological magnification and DDT can be degraded by living cells
4. bacteria can undergo biological magnification and DDT cannot be degraded by living cells

Q. Which one of the following is not correct with regard to DDT?

1. Bacteria can be degraded by living cells and DDT cannot be degraded by living cells
2. Bacteria can undergo biological magnification and DDT can be degraded by living cells
3. bacteria can undergo biological magnification and DDT cannot be degraded by living cells
4. Bacteria can undergo multiplication and DDT is degraded by living cells

Q. Select the water pollutant that is common in West Bengal and Bangladesh.

1. Arsenic
2. Sodium
3. Fluorine
4. Lead