Exams

Which  of  the  following  substances  cause temporary hardness in water?

1. Mg(HCO3)2

2. Ca(HCO3)2

3. CaCl2

4. MgSO4

A cuboid shaped wooden block has 6 cm length, 4 cm breadth and 1 cm height.
Two faces measuring 4 cm x 1 cm are coloured in black.
Two faces measuring 6 cm x 1 cm are coloured in red.
Two faces measuring 6 cm x 4 cm are coloured in green.
The block is divided into 6 equal cubes of side 1 cm (from 6 cm side), 4 equal cubes of side 1 cm(from 4 cm side).

How many cubes will have green colour on two sides and rest of the four sides having no colour ?

In the following question, select the missing number from the given series.

11, 22, 44, 88, 176, ?

What is the basis of classifying various plant tissues as meristematic tissue and permanent tissue?

ΔDEF is right angled at E. If m∠F = 30 deg, then find the value of (cosD - 1/√2).

The capacity of a stream is directly related to its

Find the surface area (in cm2) of a sphere of diameter 28 cm.

Answer the questions based on the below information.

If '+' is 'x', '-' is '+', 'x' is '/' and '/' is '-' then 3 x 2 + 4 - 2 / 9 = ?