Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why? [Class 10 Science] (3)
What is the pH of 0.001 M aniline solution. The ionization constant of aniline is 4.27 x ${{10}^{-4}}$. Cal-culate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline? [CBSE Class 11 Chemistry] (2)
Why do metals not evolve hydrogen gas with nitric acid? [Class 10 Science] (2)
In what ways can employment increased in urban areas? [CBSE Class 10 Social] (2)
Write a letter to your friend telling him about the annual day celebration in your school and write it in 150 to 200 words [CBSE Class 10] (2)
How do the logos and certification on cover help the consumers to buy standardised products? [CBSE Class 10 Social] (2)
Distinguish between open unemployment and disguised unemployment [CBSE Class 10 Social] (4)
How are consumers exploited in the marketplace? Explain with three examples [CBSE Class 10 Social] (3)
Why is the red light used as a danger signal [Class 10 Science] (5)
"Advancement of international trade of a country is an index of its economic prosperity” [CBSE Class 10 Social] (3)
What is GST registration? [Uncategorized] (1)
The edge of an aluminium cube is 10 cm long [CBSE Class 11 Physics] (3)
(a) The ratio of the widths of two slits in Young's double slit experiment is 4 : 1. Evaluate the ratio of intensities at maxima and minima in the interference pattern [CBSE Class 12 Physics] (4)
Mention any three legislative powers of the President of India [CBSE Class 9 Social] (2)
Why did Mahatma Gandhi think of Non-cooperation only? [CBSE Class 10 Social] (2)
Briefly explain the incident of the Jallianwala Bagh massacre and its effects on Punjab [CBSE Class 10 Social] (2)
Draw V-I characteristics of a p-n junction diode [CBSE Class 12 Physics] (3)
What type of flag was designed during the ‘Swadeshi Movement’ in Bengal? Explain its main features [CBSE Class 10 Social] (2)
What is the significance of PAN card today? [Uncategorized] (1)
How life started on Earth [Uncategorized] (1)
What is sexual division of labour? [CBSE Class 10 Social] (2)
Morphology of flowering plants [CBSE Class 11 Biology] (1)
What are the necessary conditions to see an object ? What is light? [Class 10 Science] (2)
Suggest a test to find the hardness of water and explain the procedure [Class 10 Science] (2)
Describe any three major problems faced by the peasants of Awadh [CBSE Class 10 Social] (3)
Calculate Net Value Added at Factor Cost [CBSE Class 12 Economics] (3)
Use Lenz’s law to determine the direction of induced current in the situations described by figure [CBSE Class 12 Physics] (3)
Use Kirchhoff s rules to determine the value of the current $I_{1 }$ flowing in the circuit shown in the figure [CBSE Class 12 Physics] (3)
Which rule is violated in the electronic configuration ${{1s}^{0}}$ ${{2s}^{2}}$ ${{2p}^{4}}$? [Class 10 Science] (2)
"Adolescence is the age of stress and strain". Explain [CBSE Class 11 Physical Education] (4)