GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
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1
The acid present in vinegar is ______________
Formic
Acetic
Citric
Malic
2
The two kinds of litmus paper are:
Blue and red
Blue and yellow
Red and green
Yellow and red
3
Acids turn litmus paper into ______________
Green
Red
Yellow
Blue
4
Vinegar contains _______________ acid.
Lactic
Hydrochloric
5
Curd contains _______________ acid.
Sulphuric
Oxalic
6
Bases are _________ in taste
Sour
Bitter
Salty
Soapy
7
Many food items such as lemons, curd, vinegar and orange taste __________ because of the presence of acid in them.
Sweet
8
____________________ do not change colour in any indicator
Acidic substances
Basic substances
Neutral substances
pH substances
9
Which of the following is the most acidic of all?
Milk
Coffee
Lemon juice
Soft drink
10
Who proposed pH scale?
Ostwald
Sorenson
Mendeleef
Bohr
11
____________ indicator is obtainted from leaves of a plant.
Litmus
Turmeric
Red Cabbage
Methyl Orange
12
Which of the following is not a natural acid?
Citric acid
Acetic acid
Sulphuric acid
Lactic acid
13
A blue litmus paper was first dipped in dil. HCI and then in dil. NaOH solution. It was observed that the colour of the litmus paper -
Changed to red
Changed first to red and then to blue
Changed blue to colourless
Remains blue in both the solutuions.
14
reacts with water to give _________________
AND
15
____________ indicator is obtainted from stem of a plant.
Beet root
China rose