English Medium Class 10 - CBSE Question Bank Solutions

Consider the carbon compounds having following molecular formula:

(i) C₃H₆ (ii) C₃H₈ (iii) C₄H₆ (iv) C₆H₆ (v) C₆H₁₂

1. State the number of double covalent bonds present in C₃H₈.
2. Write the formula of first member of the homologous series to which the carbon compound C₄H₆ belongs.
3. Which one of the above compounds forms a ring structure of carbon atoms?
4. Identify, which of the above compounds, is a member of alkane series.

Three resistors of 6Ω, 4Ω and 4Ω are connected together so that the total resistance is 8Ω. Draw a diagram to show this arrangement and give reason to justify your answer.

Name and draw the electron dot structure of first homologue of alkynes series.

Two V-I graphs A and B for series and parallel combinations of two resistors are as shown. Giving reason state which graph shows (a) series, (b) parallel combination of the resistors.

Name the third homologue of alcohols.

Name the third homologue of aldehydes.

A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this parallel combination is R₁, what is the value of the ratio R₁ : R?

Study the following circuit:

On the basis of this circuit, answer the following questions:

i. Find the value of total resistance between the points A and B.

ii. Find the resistance between the points B and C.

iii. Calculate the current drawn from the battery, when the key is closed

OR

iii. In the above circuit, the 16Ω resistor or the parallel combination of two resistors of 8 Ω, which one of the two will have more potential difference across its two ends? Justify your answer.

Why is this mode practiced for growing some types of plants?

Which of these is true for most of the organic compounds?

Bryophyllum can be propagated vegetatively by the ______ 

Vegetative propagation refers to formation of new plants from ______ 

In a potato, vegetative propagation takes place by ______ 

Vegetatively propagated plants ______ 

Which of the following is not an artificial method of vegetative propagation?

Chlorine reacts with saturated hydrocarbons at room temperature in the

Which of the following is not a straight chain hydrocarbon?

Name the reproductive and non-reproductive parts of bread mould (Rhizopus).

Consider the following organic compounds:

1. Name the functional group present in these compounds.
2. Write the general formula for the compounds of this functional group.
3. State the relationship between these compounds and draw the structure of any other compound having a similar functional group.

List two advantages of vegetative propagation technique.