Question
CH₃COOH is an organic compound but NaHCO₃ is not an organic compound; write one reason for each case.
CH₃COOH is an organic compound but NaHCO₃ is not an organic compound; write one reason for each case.
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Subject: Physical Science
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Question
Write two reasons why curd and sour fruits are not kept in copper and brass vessels for a long time
Write two reasons why curd and sour fruits are not kept in copper and brass vessels for a long time
Question
Why does a copper vessel turn green in open air?
Why does a copper vessel turn green in open air?
Question
Write the name of a gas that can be prepared using Kipp’s apparatus. Write the balanced chemical equation for the reaction of preparation of the gas.
Write the name of a gas that can be prepared using Kipp’s apparatus. Write the balanced chemical equation for the reaction of…
Question
Give an example of a solid and a liquid covalent compound.
Give an example of a solid and a liquid covalent compound.
Question
Explain with an example of a suitable ionic compound that its ions do not obey the octet rule.
Explain with an example of a suitable ionic compound that its ions do not obey the octet rule.
Question
Liquid hydrogen chloride is unable to conduct electricity, but molten sodium chloride is able to conduct electricity — explain
Liquid hydrogen chloride is unable to conduct electricity, but molten sodium chloride is able to conduct electricity — explain
Question
The length of a wire having a resistance of 15 ohms is stretched by 20%. If the volume of the wire remains constant after stretching and its cross-section remains uniform throughout, determine the new resistance of the wire.
The length of a wire having a resistance of 15 ohms is stretched by 20%. If the volume of the wire remains…
Question
A convex lens forms a 10 times magnified image of an object. If the length of the object is 5 cm, determine the length of the image.
A convex lens forms a 10 times magnified image of an object. If the length of the object is 5 cm, determine…
Question
Determine the speed of a light ray passing through a glass slab of refractive index 1.5
Determine the speed of a light ray passing through a glass slab of refractive index 1.5. [c = 3 × 10⁵ m…