For a crystal system a b c and the example for this crystal system is
A. CuSO4.5H2O
B. Na2B4O7.10H2O
C. ZnSO4.7H2O
D. BaSO4.4H2O
Correct Answer: A. CuSO4. 5H2O
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All of the following have crystals except
A. diamond
B. NaCI
C. KBr
D. CdS
Correct Answer: D. CdS
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Kerosene is liquid at room temperature due to
A. hydrogen bonding
B. organic nature
C. dipole-dipole forces
D. molecular size
Correct Answer: D. molecular size
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All of the following are network solids except
A. SiO2
B. Graphite
C. S8
D. Diamond
Correct Answer: C. S8
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Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to
A. hydrogen bonding
B. irregular shape of the molecules
C. irregular shape of the molecules and strong intermolecular forces
D. greater molecular size
Correct Answer: C. irregular shape of the molecules and strong intermolecular forces
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Rate of evaporation of petrol is greater than that of water at room temperature because
A. petrol molecules do not have any hydrogen bond
B. petrol is an organic compound
C. water molecules have small size
D. petrol molecules have greater size
Correct Answer: A. petrol molecules do not have any hydrogen bond
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Substance having highest boiling point among the following is
A. HF
B. HCI
C. Br2
D. HBr
Correct Answer: C. Br2
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