List of top Questions asked in CBSE CLASS XII

The activation energy (E$_a$) of a reaction can be determined from the slope of which of the following plots?
The reaction $R$ -OH + Na $\longrightarrow$ RO$^-$ Na$^+$ + $\frac{1}{2}$ H$_2$ (g) suggests that alcohols are:
Assertion (A): Cooking time is reduced in pressure cooker.
Reason (R): Boiling point of water inside the pressure cooker is elevated.
Assertion (A): Actinoids show irregularities in their electronic configurations.
Reason (R): Actinoids are radioactive in nature.
Which of the following is the softest metal?
The freezing point of one molal KCl solution, assuming KCl to be completely dissociated in water, is: (\(K_f\) for water = 1.86 K kg mol\(^{-1}\))
A solution of acetone in ethanol:
The unit of rate and rate constant are the same for a:
Acidified KMnO$_4$ oxidizes sulphite to:
The acid formed when propyl magnesium bromide is treated with CO$_2$ followed by acid hydrolysis is:
An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because __________
“Human geography is the synthetic study of relationship between human societies and earth’s surface.” This definition of human geography is given by _______.
Which one of the following is the core concern of geography as a discipline ?
The concept of ‘Neodeterminism’ was introduced by _______.
Read the following statements about ports carefully and choose the correct option :
(i) The ports provide the facilities of loading, unloading and storage of cargo.
(ii) The importance of ports is judged by the size of its hinterland.
(iii) The quantity of cargo handled by a port indicates the level of development of its hinterland.
(iv) Ports are the chief gateways of the world trade.
Two statements are given below. They are Assertion and Reason (R).
Read both the statements carefully and choose the correct option :
Assertion : ‘World Trade Organisation (WTO) is widening the gulf between rich and poor by making rich countries richer.’
Reason (R) : ‘The influential nations in the WTO focus on their own commercial interests.’
Choose the correct option to fill the blank.
The act of opening up economies for trading is known as _______.
Arrange the following towns of India from the oldest to the newest order based on their historical evolution and choose the correct option :
(i) Jaipur
(ii) Chandigarh
(iii) Madurai
(iv) Jamshedpur
Read the following statements related to the objectives of smart city mission carefully and choose the correct option :
(i) To promote the city with clean and sustainable environment.
(ii) To provide decent quality of life to its citizens.
(iii) To provide employment to the job seekers.
(iv) To make the city less vulnerable to disasters.
Local names like Panna, Para, Palli, Nagla, Dhani etc. are examples of which of the following types of rural settlements in India ?
Two statements are given below. They are Assertion and Reason (R). Read both the statements carefully and choose the correct option :
Assertion : ‘The agriculturally rich states of Punjab, Haryana and western Uttar Pradesh are facing the crisis of groundwater depletion.’
Reason (R) : ‘More groundwater is utilised for irrigation than water-table recharge.’
Read the following statements related to Indira Gandhi Canal Project carefully and choose the correct option :
(i) Indira Gandhi Canal project was conceived by Kanwar Sain in 1950 and it was launched in 1961.
(ii) Introduction of canal irrigation has brought perceptible changes in the agricultural economy of the command area.
(iii) Spread of canal irrigation has led to increase in cultivated area and crop intensity.
(iv) Traditional crops of jowar, bajra has been replaced by rice and wheat etc.
Read the following statements related to international trade of India carefully and choose the correct option :
(i) India has a long coastline surrounded by ocean from three sides.
(ii) Indian coasts have a large number of well-developed sea ports.
(iii) Kandla port exports huge amount of iron-ore.
(iv) The transportation cost by water is very cheap for voluminous items.
Why is it that slums are the areas of residence with least choice ? Choose the correct options :
(i) They have dilapidated houses with poor ventilation.
(ii) The basic facilities like lights and toilets are difficult to get.
(iii) Hygienic conditions and drinking water are improper.
(iv) Better drainage facilities are available.
The watershed management programme in Jhabua district of Madhya Pradesh is funded by which one of the following ministries ?