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Chemistry 10th Class Past Papers Lahore Board 2023, Group 2
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Chemistry MCQs with Answer 2023 Group 2
- Gas used for cleaning swimming pool:
- (a). Iodine
- (b). Chlorine
- (c). Flourine
- (d). Bromine
- Answer: (B)
- One of the following is a reducing sugar:
- (a). Glucose
- (b). Maltose
- (c). Sucrose
- (d) Starc
- Answer: (A)
- Identify that which product is used as jet fuel:
- (a). Kerosene oil
- (b). Lubricating oil
- (c). Diesel oil
- (d). Fuel oil
- Answer: (A)
- A dynamic equilibrium:
- (a). Reaction stops to proceed
- (b). The amount of reactants and products are equal
- (c). The speed of forward and reverse reaction are equal
- (d). The reaction can no longer be reversed
- Answer: (C)
- In Solvay’s process slaked lime is used to:
- (a). Prepare CO2
- (b). Prepare quick lime
- (c). Recover ammonia
- (d). Form Na2CO3
- Answer:(C)
- One is a lewis base:
- (a). NH3
- (b).BF3
- (c). H+
- (d). AlCl3
- Answer: (A)
- Vigorbus reaction of water_____shatter (glass wear) into small pieces:
- (a).Sodium
- (b). Caesium
- (c). Strontium
- (d). Silicon
- Answer:(B)
- Coal having 90% carbon content is called:
- (a). Peat
- (b). Lignite
- (c). Anthracite
- (d). Bituminous
- Answer:(C)
- Ion is the conjugate base of sulphuric acid:
- (a). SO-23
- (b). S2-
- (c). HSO–3
- (d). HSO–4
- Anwer: (D)
- Acid rain effect the aquatic life by clogging fish gills because of:
- (a). Lead metal
- (b). Chromium metal
- (c). Mercury metal
- (d). Aluminium metal
- Answer:(D)
- The order of reactivity of hydrogen halides with alkenes is:
- (a). HI>HBr
- (b). HBr>HI
- (c). HCL>HBr
- (d). HBr>HCl
- Answer: (A)
- Carbon monoxide is harmful to us because:
- (a). It paralyses the lungs
- (b). It damages lung’s tissues
- (c). It reduces oxygen carrying ability of haemoglobin
- (d). It makes the blood coagulate
- Answer: (C)
