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

The number of carbon compounds is very large because:

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 :

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

Which of the following statements are correct?

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

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

______ is the perfectly crystalline allotrope of carbon.

In a covalent bond formation:

Which of the given statements is true?

Which statement about bonding is not correct?

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

Ethanol reacts with sodium and forms two products. These are

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

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

Identify the unsaturated compounds from the following

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

When two pairs of electrons are shared, bond is

The chlorination of methane is an example of:

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:

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: