PRACTICE TEST -2-Class 10 – Science -Chemistry -Chapter 4 – Carbon and its Compounds

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:

Which statement about bonding is not correct?

A group closely related compounds which can be expressed by a general formula & in which two consecutive members differ by 14 in their molecular masses is called:

Assertion: When a hydrocarbon is combusted in air, carbon monoxide is always the major product.

Identify the unsaturated compounds from the following

Washing soaps produce scum with hard water and not much foam because hard water contains:

Which of the following statement(s) is/are correct?

When two pairs of electrons are shared, bond is

In a covalent bond formation:

Assertion: In O/W emulsion, soap is mixed.

Ethanol reacts with sodium and forms two products. These are

An element X has 6 electrons in its outermost shell. Then the number of electrons shared by X with another atom to form a covalent bond is:

The chlorination of methane is an example of:

Which of the following statements are correct?

Which pollutant gas can be produced as a result of incomplete combustion of octane (C8 H18)?

In the presence of the acid catalyst, ethanoic acid reacts with ethanol to produce________.

Which of the given statements is true?

The number of carbon compounds is very large because:

______ is the perfectly crystalline allotrope of carbon.

An organic compound 'A' produces a gas with brisk effervescence when sodium bicarbonate is added to it. The compound 'A' contains the same number of carbons as in ethane. The compound 'A' reacts with ethanol to form a sweet-smelling compound 'C' in presence of conc.  H2SO4 acid. Then the name of compound A and the gas evolved is :