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Worksheetsterm 1 chemistry
Total questions: 27
Worksheet time: 9mins
An acid (A) with sodium hydrogen carbonate is used in making the cakes fluffy and spongy. It is due to the release of (B) gas in the reaction. Here, X and Y are -
A : Oxalic acid
B : CO2
A : Tartaric acid
B : O2
A :Sulphuric acid
B : H2
A : Tartaric acid
B : CO2
Assertion : To dilute concentrated sulphuric acid,
water is added to the acid slowly.
Reason : A lot of heat energy will be given out in the dilution of concentrated sulphuric acid
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Assertion (A) is true but reason (R) is false.
Assertion (A) is false but reason (R) is true
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
choose the correct options below :
A
B
C
D
Hydrogen chloride gas turns blue litmus red
True
False
Sodium hydrogen carbonate is used in fire extinguisher
True
False
Solution of sodium hydrogen carbonate is acidic in nature
True
False
Baking powder is not used in baking cakes
True
False
Acids and bases neutralize each other to form corresponding salts and water.
True
False
Neutral solutions have a pH of 0.
True
False
When an acid reacts with a metal, ......... gas is evolved and a corresponding ......... is formed.
Hydogen, chlorine
Hydogen, salt
Water, salt
Water, chlorine
.......... is a natural indicator whereas ......... is a synthetic indicator
Litmus, phenolphthalein
vaniila, phenolphthalein
phenolphthalein, Litmus
Mythl Orange
Bases are ......... in taste and change the colour of red litmus to .........
bitter, blue
bitter, red
sour, blue
sour, red
ENO contains ........ and is ......... in nature
sodium hydrogen carbonate, basic
sodium hydrogen carbonate, Acidic
sodium carbonate, basic
none of the above
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains
KCl
HCl
NaCl
LiCl
A substance which oxidises itself and reduces other is known as -
oxidising agent
reducing agent
both of these
None
1. When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of-
combination reaction
displacement reaction
decomposition reaction
double displacement reaction
1. When calcium carbonate is heated, it decomposes to from .......... and gas.
calcium oxide, carbon dioxide
calcium hydroxide, carbon dioxide
calcium oxide, carbon monoxide
calcium oxide, oxygen
Electrolysis of water is a....................... decomposition reaction
thermal
photolytic
electric
both ii and iii
A magnesium ribbon burns with a dazzling flame in air and changes into a white precipitate, magnesium oxide.
True
False
Rusting is a double displacement reaction
true
false
can't say
Reduction is the _______ of oxygen or ________ of hydrogen
loss, gain
gain, loss
gain, gain
loss, loss
Assertion : Corrosion of iron is commonly known as rusting.
Reason : Corrosion of iron occurs in presence of water and air.
both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
A is true but R is false
A is false but R is true
Assertion (A) : Sodium metal is stored under Kerosene. Reason (R) : Metallic sodium melts when exposed to air
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Assertion is correct but Reason is incorrect
Assertion is incorrect but Reason is correct
Assertion(A) : Calcium corbonate when heated gives calcium oxide and water.
Reason (R) : On heating calcium carbonate, decomposition reaction takes place
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
If Assertion is correct but Reason is incorrect.
If Assertion is incorrect but Reason is correct
Assertion : Photosynthesis is considered as an endothermic reaction.
Reason : Energy gets released in the process of photosynthesis
both Assertion and Reason are correct and Reason is the correct explanation of Assertion
both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
Assertion is correct but Reason is incorrect.
Assertion is incorrect but Reason is correct
THANK YOU FOR ATTEMPTING HONESTLY
did you cheated ?
yes
no
which one of the following is also called green vitrol
CuSO4.5H2O
FeSO4.7H2O
H2SO4
None of the Above
