Q1. Which of the following is likely to reach our body via the food chain in the event of an atomic bomb explosion?
(a) U-235
(b) Sr-90
(c) K-40
Q2. A radioactive substance emits which of the following particles?
(a) alpha particle
(b) beta particle
(c) gamma particle
(d) all of the three
Q3. A detergent is a—
(a) cleansing agent
(b) drug
(c) catalyst
(d) soap
Q4. Candles contains a mixture of which of the following?
(a) Bees wax and paraffin wax
(b) Bees wax and stearic acid
(c) Paraffin wax and stearic acid
(d) Higher fatty acid
Q5. ‘Acid rain’ is caused due to air-pollution by
(a) carbon dioxide
(b) carbon monoxide
(c) methane
(d) nitrous oxide and sulphur dioxide
Q6. Which gas is used in filling electric bulbs?
(a) Neon
(b) Argon
(c) Radon
(d) Krypton
Q7. When soggy biscuits are kept inside the fridge for some time they become crisp because—
(a) cooling releases extra moisture
(b) humidity inside the fridge is low and extra moisture is absorbed
(c) humidity inside the fridge is high and extra moisture is absorbed
(d) pressure inside the fridge is high and helps in releasing extra moisture
Q8. Alum is used as—
(a) an analgesic
(b) a fertilizer
(c) a disinfectant
(d) a purifier for water
Q9. Which of the following is an antidiabetic drug?
(a) Insulin
(b) Penicillin
(c) Chloroquine
(d) Aspirin
Q10. Which one of the following mixtures is homogeneous?
(a) Starch and sugar
(b) Methanol and water
(c) Graphite and charcoal
(d) Calcium carbonate and calcium bicarbonate
Solution
S1.Ans.(b)
S2.Ans.(d)
S3.Ans.(a)
S4.Ans.(c)
S5.Ans.(d)
S6.Ans.(b)
S7.Ans.(b)
S8.Ans.(d)
S9.Ans.(a)
S10.Ans.(b)
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