Multiple Choice Questions (MCQs) (Based on Practical Skills in Science)
1. Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip
(1) turned blue (3) times green and suddenly yellow
(2) did not change
(4) turned light pink
2. When dilute hydrochloric acid is added to granulated zinc placed in a test tube, 4) the surface of the metal tums shining
(3) odour of chlorine is observed an aluminium strip is kept immersed
3. When an
change whic tube the which is observed is (1) light green solution slowly turns colourless
the observation made is
(2) the reaction mixture turns milky
(4) a colourless odourless gas evolves with bubbles in freshly prepared ferrous sulphate solution taken in
a tesi
(2) the lower end of the test tube becomes slightly warm
(3) a colourless gas with smell of burning sulphur is observed (4) light green solution changes to blue
4. The description which most approximately suits sulphur dioxide gas is that it is colourless and
(1) insoluble in water (1)
(3) lighter than air
(2) has pungent and suffocating odour
(4) has smell of rotten eggs
5. Ethanoic acid was added in drops to water and it was noticed
(1) the acid formed a separate layer on the top of water (2) water formed a separate layer on the top of the acid
(3) a clear and homogeneous solution was formed
6. 4) a pink and clear solution was formed colourless
that
s liquid sample was tested with pH paper strip. The colour of the strip changed to reddish pink
The sample could be (1) tap water
:
(2) sodium hydroxide solution (3) distilled water (4) ethanoic acid solution 7. Ethanoic acid was added to sodium hydrogencarbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported
(a) The gas burns with the pop sound and the flame gets extinguished. (b) The gas does not burn but the splinter burns with a pop sound. (c) The flame extinguishes and the gas does not burn.
(d) The gas burns with a blue flame and the splinter burns brightly
The correct observation is reported in: (1) (a)
(2) (b)
(3) ()
(4) (d)
8. Which one of the following set ups is the most appropriate for the evolution of hydrogen gas and its
identification ?
:
They re
Studer
B
Wh
(1)
10. Fou
fol
(a) (
(c)
(d)
dilute NAOH Zinc
dilute NaOH
Zinc
Answers
Answer:
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Explanation:
tock of? 3,75,000 on 31st March, 2016. Subsequently the following information was obtained from
scrutiny of the books:
(1) Purchases for the year included ? 15,000 paid for new electric fittings for the shop.
(1) Hanuman gave away goods valued at 40,000 as free samples for which no entry was made in
the books of accounts.
(ii) Invoices for goods amounting to 2,50,000 have been entered on 27th March, 2016, but the
goods were not included in stock.
(iv) In March, 2016 goods of 2,00,000 sold and delivered were taken in the sales for April, 2016.
(v) Goods costing 75,000 were sent on sale or return in March, 2016 at a margin of profit of 33-1/3%
on cost. Though approval was given in April, 2016 these were taken as sales for March, 2016.
Calculate the value of stock on 31st March, 2016 and the adjusted net profit for the year ended on that
date.