Recent questions without answers

0 votes

0 answers 194 views

Draw Diagram for bonding in ethene with sp2 Hybridisation.

asked Oct 18, 2021 in Chapter 5: Chemical Bonding by Doubtly (98.9k points)

0 votes

0 answers 121 views

Draw Lewis dot diagrams for the folowing a. Hydrogen (H2 ) b. Water (H2 O)

asked Oct 18, 2021 in Chapter 5: Chemical Bonding by Doubtly (98.9k points)

0 votes

0 answers 110 views

simple mock test quiz demo

asked Oct 18, 2021 in Uncategorized by Doubtly (98.9k points)

0 votes

0 answers 176 views

What is a catalyst ? Write any one reaction which is brought about by use of catalyst ?

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 153 views

What is meant by vinegar and gasohol? What are their uses ?

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 200 views

Give names of three natural polymers. Write the place of their occurrance and names of monomers from which they are formed.

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 146 views

Give names of three functional groups containing three different hetero atoms. Write name and structural formula of one example each.

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 152 views

Give any four functional groups containing oxygen as the heteroatom in it. Write name and structural formula of one example each.

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 121 views

Saturated hydrocarbons are classified into three types. Write these names giving one example each

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 164 views

Write structural formulae for the following IUPAC names.

asked Oct 10, 2021 in Chapter 9: Carbon Compounds by Doubtly (98.9k points)

0 votes

0 answers 147 views

Complete the following statement using every given options. During the extraction of aluminium..............

asked Oct 9, 2021 in Chapter 8: Metallurgy by Doubtly (98.9k points)

0 votes

0 answers 178 views

An object kept 60 cm from a lens gives a virtual image 20 cm in front of the lens.

asked Oct 9, 2021 in Chapter 7: Lenses by Doubtly (98.9k points)

0 votes

0 answers 119 views

Three lenses having power 2, 2.5 and 1.7 D are kept touching in a row. What is the total power of the lens combination?

asked Oct 9, 2021 in Chapter 7: Lenses by Doubtly (98.9k points)

0 votes

0 answers 247 views

5 cm high object is placed at a distance of 25 cm from a converging lens of focal length of 10 cm.

asked Oct 9, 2021 in Chapter 7: Lenses by Doubtly (98.9k points)

0 votes

0 answers 199 views

4.A calorimeter has mass 100 g and specific heat 0.1 kcal/ kg °C. It contains 250 gm of liquid at 30°C having specific heat of 0.4 kcal/kg °C.

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

0 votes

0 answers 231 views

A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained?

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

0 votes

0 answers 106 views

Liquid ammonia is used in ice factory for making ice from water. If water at 20°C is to be converted into 2 kg ice at 0°C,

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

0 votes

0 answers 267 views

If vector a,b,c are three mutually perpendicular vectors equally inclined to vector a + b + c at angle θ, then find the value of 36 cos^2 2θ.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

0 votes

0 answers 215 views

The mean of 6 numbers is 6.5 and its variance is 10.25. If 4 numbers are 2,4,5 and 7, then find the other two.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

0 votes

0 answers 282 views

Benzene has vapor pressure of 70 torr and methyl benzene has 20 torr .

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

Recent questions without answers

Most popular tags