The most electronegative element from the following elements is:

A. Magnesium

B. Chlorine

C. Aluminium

D. Sulphur

Name the soil which is acidic in nature

To increase the pH value of a neutral solution, we should add:

1. an acid
2. an acid salt
3. an alkali
4. a salt

Under what condition can a non-member of Parliament be made a Minister?

Action of concentrated Nitric acid on Sulphur.

In some xerophytes leaves are modified into spines.

A sound wave travelling in water has wavelength 0.4 m. Is this wave audible in air? (The speed of sound in water = 1400 ms^-1)

Pulmonary semilunar valve

Mention the exact location of the following:

Give a reason: Plastic and polythene products must be banned

A uniform meter scale is in equilibrium as shown in the diagram:

1. Calculate the weight of the meter scale.
2. Which of the following options is correct to keep the ruler in equilibrium when 40 gf wt is
...

An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 x 10⁸ m s^-1.

State a method of soil conservation in the: river valleys prone to flood.

Using ruler and a compass only construct a semi-circle with diameter BC = 7cm. Locate a point A on the circumference of the semicircle such that A is equidistant from B and C. Complete the cyclic...

Priyanka has a recurring deposit account of ₹1000 per month at 10% per annum. If she gets ₹5550 as interest at the time of maturity, find the total time for which the account was held.

How is the frequency of a stretched string related to:

1.  its length?
2. its tension?