English Medium इयत्ता १० - CBSE Question Bank Solutions

Which one among the following is an acidic oxide?

An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.

Which of the following is the purest form of carbon?

Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would she observe?

When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula ______.

The correct structural formula of butanoic acid is -

Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that ______.

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of ______.

Which of the following statements are usually correct for carbon compounds? These

1. are good conductors of electricity
2. are poor conductors of electricity
3. have strong forces of attraction between their molecules
4. do not have strong forces of attraction between their molecules.

Cation is formed when ______.

The I.U.P.A.C name of CH₃CH₂CH = CH₂ is?

Which of the following compounds of carbon does not consist of ions?

Which of the following statements are correct for carbon compounds?

1. Most carbon compounds are good conductors of electricity.
2. Most carbon compounds are poor conductors of electricity.
3. Force of attraction between molecules of carbon compounds is not very strong.
4. Force of attraction between molecules of carbon compounds is very strong.

Plants like banana, rose, jasmine, orange have lost the capacity to produce ______ 

The part of the flower which is present in the centre of the flower is ______ 

Which of the following is the formula of Butanoic acid?

In the following Figure, parts A, B, and C are sequentially 

In the following Question, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

Assertion: Variation is high in sexually reproducing organisms compared to asexually reproducing organisms.

Reason: Inaccuracies during DN A copying give rise to variation.

A cable manufacturing unit tested few elements on the basisof their physical properties.

Which of the above elements were dicarded for usage by the company?

Which of the following is not a physical change?