MCQ For X SA1 Chemistry - paper 1
14 questions ..each carry 1 mark.
By Sulekha Rani.R , PGT Chemistry, KV NTPC Kayamkulam
1. The two colours seen at the extreme ends of the pH chart are
(a) red and blue.
(b) red and green.
(c) green and blue.
(d) orange and green
2. A student observed that the colour of pH paper changes to green when she
dipped it in water. She added a few drops of concentrated hydrochloric acid to
the water. The colour of pH paper would turn to
(a) light red.
(b) apple green.
(c) dark blue.
(d) lemon yellow.
3. When zinc reacts with dilute hydrochloric acid
(a) the surface of zinc becomes brighter.
(b) the surface of zinc becomes black and dull.
(c) the metal turns into powder.
(d) the reaction mixture turns green.
4. 10 mL of freshly prepared iron sulphate was taken in each of four test tubes.
Strips of copper, iron, zinc and aluminium were introduced, each metal in a
different test tube. A black residue was obtained in two of them. The right pair of
metals forming the precipitates is
(a) copper and zinc.
(b) aluminium and copper.
(c) iron and aluminium.
(d) zinc and aluminium.
5. A strip of copper was placed in a beaker containing zinc sulphate solution. On
observing the strip the next day, it was noticed that
(a) the copper strip remained as it was.
(b) the copper strip became thinner.
(c) the copper strip became thicker.
(d) the colour of the strip changed.
6. A student tested the pH of distilled water and found that the colour of the pH
paper changed to green. He checked the pH again after dissolving a pinch of
common salt in it. The colour of the pH paper this time was
(a) green.
(b) yellow.
(c) red.
(d) blue
7. Bottle A contains oxalic acid and bottle B contains sodium carbonate solution.
When pH paper is dipped in each of the solutions, the colour seen in A and B
respectively be
(a) orange, blue.
(b) blue, orange.
(c) green, blue.
(d) orange, green.
8. The zinc metal used in the laboratory for doing experiments is available in the
form of
(a) filings.
(b) strips.
(c) granules.
(d) pellets.
9. . When you place an iron nail in copper sulphate solution, the reddish brown
coating formed on the nail is
(a) soft and dull.
(b) hard and flaky.
(c) smooth and shining.
(d) rough and granular.
10. When you place an iron strip in the solution of copper sulphate, the time required
for the colour of the solution to change from blue to green is about
(a) a second.
(b) an hour.
(c) 8 hours.
(d) 24 hours
11. On adding sodium bicarbonate to acetic acid, you immediately
(a) observe strong effervescence.
(b) hear hissing sound.
(c) get pungent smell.
(d) notice formation of bubbles.
12. A student took the following samples to find out their pH using pH paper. The
teacher remarked that one of the samples taken was not proper. The teacher was
referring to
(a) dilute hydrochloric acid.
(b) lemon juice.
(c) washing soda.
(d) soap solution.
13. To test the presence of an acid with a strip of red litmus paper you would
(a) dip the strip as it is in the sample and see the colour change.
(b) moisten the paper with water and dip in the given sample.
(c) first dip strip in common salt solution and then use to it test the sample.
(d) first dip strip in alkaline solution and then use it to test the sample.
14. A student was given three samples containing ethanoic acid, sodium bicarbonate
solution and water in test tubes I, II and III, respectively. On dipping a pH paper
in them, he observed that the colour turned orange in I, blue in II and green in III.
If arranged in increasing order of their pH, the sequence of these bottles would be
(a) I, III, II.
(b) I, II, III.
(c) III, I, II.
(d) II, III, I.
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