Carbon and its Compounds — Science STD 10 — Question

A soap molecule has a:

Compounds with identical molecular formula but different structural formula are called...

Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

1. Has high melting point.
2. Has low melting point.
3. Conducts electricity in molten state.
4. Occurs as solid.

Which of the following statements is not correct?

Which of the following statements about graphite and diamond is true?

Which one of the following metals do not react with cold as well as hot water?

1. Na.
2. Ca.
3. Mg.
4. Fe.

The electronic configurations of three elements X, Y and Z are:
X : 2
Y : 2, 8, 7
Z : 2, 8, 2
Which of the following is correct regarding these elements?

1. X is a metal.
2. Y is a metal.
3. Z is a non-metal.
4. Y is a non-metal and Z is a metal.

Which one of the following metals do not react with cold as well as hot water?

Which of the following statements are correct regarding isomers?
I. Isomers have same structural formula.
II. Isomers have same molecular formula.
III. Isomers have same chemical properties.
IV. The compound C₃⁢H₈ has no isomers.

Which of the following non-metal is a liquid?

1. Carbon.
2. Sulphur.
3. Bromine.
4. Iodine.