Q.1:- Activated charcoal is employed to remove colouring matter from pure substance, it works by ?
- Bleaching
- Oxidation
- Reduction
- Adsorption
Q.2:- Important ore of lead is ?
- Cassiterite
- Siderite
- Haematite
- Galena
Q.3:- Which one of the following is most reactive ?
- White phosphorous
- Black phosphorous
- Violet phosphorous
- Scarlet phosphorous
Q.4:- Ozone molecule is ?
- Linear
- Paramagnetic
- Diamagnetic
- Tetrahedral
Q.5:- The following compound reacts with concentrated H2SO4 to give CO2 gas ?
- Formic Acid
- Sugar
- Oxalic Acid
- Ethanol
Q.6:- Sulphuric acid has great affinity for water because ?
- It hydrolysis the acid
- It decomposes the acid
- Acid forms hydrates with water
- None
Q.7:- Anhydride of hypo chlorus acid is ?
- Cl2O
- ClO2
- Cl2O5
- ClO3
Q.8:- The characteristics odour of garlic is due to ?
- A chloro compound
- A sulphur compound
- A fluorine compound
- Acetic Acid
Q.9:- Which one is not an organic compound ?
- Ammonium Cyanate
- Marsh Gas
- Urea
- Cane Sugar
Q.10:- Latest technique for purification, isolation and separation of organic compounds is ?
- Chromatography
- Steam distillation
- Crystallization
- Vacuum Distillation
Q.11:- Anthracene is purified by ?
- Filtration
- Distillation
- Crystallization
- Sublimation
Q.12:- Compounds having same number and kind of atoms but different arrangement of atoms in their molecules are called ?
- Allotropes
- Isotopes
- Isomers
- Polymers
Q.13:- Petroleum is found ?
- On the surface of the earth
- In the atmosphere
- In arctic ocean
- Deep under the surface of the earth
Q.14:- Successive alkens differ by ?
- CH2
- CH
- CH3
- C2H4
Q.15:- Ethanol containing some methanol is called ?
- Methylated Spirit
- Rectified Spirit
- Absolute Spirit
- None of these
Q.16:- Fermentation of Ethyl Alcohol into acetic acid is done by ?
- Zymase
- Diastase
- Maltase
- Bacterium Mycoderma Aceti
Q.17:- Which of the following is used in synthetic lemonade ?
- Tartaric Acid
- Acetic Acid
- Citric Acid
- Oxalic Acid
Q.18:- The offending substance in the liquor tragedies leading to blindness etc. is ?
- Ethyl Alcohol
- Amyl Alcohol
- Benzyl Alcohol
- Methyl Alcohol
Q.19:- Starch is a polymer of ?
- Fructose
- Glucose
- Both (A) and (B)
- None of these
Q.20:- Which one is not the essential constituent of balanced diet ?
- Hormones
- Carbohydrates
- Fats
- Vitamins
Q.21:- Which one of the following contains Cobalt ?
- Chlorophyll
- Haemoglobin
- Vitamin C
- Vitamin B12
Q.22:- Keratin, a fibrous protein is present in ?
- Hair and Nails
- Wool
- Skin
- All of these
Q.23:- Global warming may result in ?
- Flood
- Cyclone
- Decrease in forest productivity
- All of the above
Q.24:- Acid rain is caused by the pollution of environment by ?
- Carbon Dioxide and Nitrogen
- Carbon Monoxide and Carbon Dioxide
- Ozone and Carbon Dioxide
- Nitrous Oxide and Sulphur Dioxide
Q.25:- Which one of the following is not a cause for present global warming and climate change ?
- CFC Emission
- Carbon Dioxide Emission
- Deforestation
- Methane Emission