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1551.

What is molecular plane? And how to judge a molecular plane?

Answer» What is molecular plane? And how to judge a molecular plane?
1552.

Green vitriol is the common name of .

Answer»

Green vitriol is the common name of .

1553.

what is chain propagation?

Answer»

what is chain propagation?

1554.

Which of the following is used to kill the micro-organism or prevent its growth?

Answer»

Which of the following is used to kill the micro-organism or prevent its growth?



1555.

If the radius of the anion in an ionic solid is 200pm, what would be the radius of cation that fits exactly into a cubic hole?

Answer» If the radius of the anion in an ionic solid is 200pm, what would be the radius of cation that fits exactly into a cubic hole?
1556.

The atom of an element X has 18 protons, 22 neutrons and 18 electrons. The atomic number of the element is ___

Answer»

The atom of an element X has 18 protons, 22 neutrons and 18 electrons. The atomic number of the element is ___

1557.

Which of the following relations for expressing volume of a sample is not correct?

Answer»

Which of the following relations for expressing volume of a sample is not correct?


1558.

4. Density of dry air containing only N2 and O2 is 1.15 gram/litre at 740 mm of Hg and 300 Kelvin what is percentage composition of N2 by weight in the air

Answer» 4. Density of dry air containing only N2 and O2 is 1.15 gram/litre at 740 mm of Hg and 300 Kelvin what is percentage composition of N2 by weight in the air
1559.

in a ccp structure if half of the face centered atoms are removed , then percentage void in unit cell is approx. ??

Answer» in a ccp structure if half of the face centered atoms are removed , then percentage void in unit cell is approx. ??
1560.

73. 6 grams urea is decomposed by 2 M N a o H. Volume of 2 M NaOH required is

Answer» 73. 6 grams urea is decomposed by 2 M N a o H. Volume of 2 M NaOH required is
1561.

If velocity and accelearation of a particle are both negative then will the object be speeding up?

Answer» If velocity and accelearation of a particle are both negative then will the object be speeding up?
1562.

mass of body how decrease on removal of electrons the charge on electron is negative then it should decrease

Answer» mass of body how decrease on removal of electrons the charge on electron is negative then it should decrease
1563.

Name the process which can be used to separate a mixutre of salt solution and sand.

Answer»

Name the process which can be used to separate a mixutre of salt solution and sand.

1564.

10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to

Answer»

10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to



1565.

What were the observations made by E.Goldstein?

Answer» What were the observations made by E.Goldstein?
1566.

Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons.​

Answer» Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons.​


1567.

The boiling point of water is ____ .

Answer»

The boiling point of water is ____ .

1568.

How can we obtain the coloured component (dye) from ink?

Answer» How can we obtain the coloured component (dye) from ink?
1569.

What if electron donating groups are present at meta position with respect to halogen atom, does it still decreases the reactivity of aryl halides??

Answer» What if electron donating groups are present at meta position with respect to halogen atom, does it still decreases the reactivity of aryl halides??
1570.

A trekker climbs up a mountain with a barometer. As he goes up, the mercury column ____.

Answer»

A trekker climbs up a mountain with a barometer. As he goes up, the mercury column ____.



1571.

In which of the following molecule the bond length around the central atom is not equalA) BF3B) SF6C) PF5D) PCl3

Answer» In which of the following molecule the bond length around the central atom is not equal
A) BF3
B) SF6
C) PF5
D) PCl3
1572.

what is homoleptic

Answer» what is homoleptic
1573.

Isoelectric point is the pH at which:

Answer»

Isoelectric point is the pH at which:


1574.

When A = ϕ, then the number of elements in P(A) is ____________.

Answer» When A = ϕ, then the number of elements in P(A) is ____________.
1575.

At the start of an experiment, one end of a U-tube of 6 mm glass tubing isimmersed in concentrated ammonia solution and the other end in concentratedhydrochloric acid. At the point in the tube where vapours of ammonia andhydrochloric acid meet, white cloud is formed. At what fraction of the distancealong the tube from the ammonia solution, the white cloud first form?a. 0.682c. 0.466b. 0.595d. 0.534

Answer» At the start of an experiment, one end of a U-tube of 6 mm glass tubing is
immersed in concentrated ammonia solution and the other end in concentrated
hydrochloric acid. At the point in the tube where vapours of ammonia and
hydrochloric acid meet, white cloud is formed. At what fraction of the distance
along the tube from the ammonia solution, the white cloud first form?
a. 0.682
c. 0.466
b. 0.595
d. 0.534
1576.

34. if the ratio of Rates of diffusion of two gases X and Y is 9 : 1 the ratio of their densities is

Answer» 34. if the ratio of Rates of diffusion of two gases X and Y is 9 : 1 the ratio of their densities is
1577.

What is Haematology?

Answer»

What is Haematology?

1578.

9.A: pressure directly proportional to absolute temperature according to Charles law R: on heating the gas kinetic energy of the particles increases and these strike the walls of container more frequently does exerting more pressure.

Answer» 9.A: pressure directly proportional to absolute temperature according to Charles law R: on heating the gas kinetic energy of the particles increases and these strike the walls of container more frequently does exerting more pressure.
1579.

The number of elements in each of the long periods of the modern periodic table is:

Answer»

The number of elements in each of the long periods of the modern periodic table is:


1580.

Which state of matter is the easiest to compress?

Answer»

Which state of matter is the easiest to compress?



1581.

how did we measure the mass of one mole of a subs†an ce

Answer» how did we measure the mass of one mole of a subs†an ce
1582.

Explain why holes are made in hanging banners and hoardings.

Answer» Explain why holes are made in hanging banners and hoardings.
1583.

14.Structure of isopentane

Answer» 14.Structure of isopentane
1584.

What is the ratio of hydrogen atoms present in heptyne to that in butene?

Answer»

What is the ratio of hydrogen atoms present in heptyne to that in butene?



1585.

The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element?

Answer»

The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element?

1586.

12 Magnesium+oxygen= Magnesium oxide. Is it a chemical equation?

Answer» 12 Magnesium+oxygen= Magnesium oxide. Is it a chemical equation?
1587.

is the biggest natural threat that the Taj Mahal has been subjected to overtime.

Answer» is the biggest natural threat that the Taj Mahal has been subjected to overtime.
1588.

Which of the following mineral does not contain Al ?

Answer»

Which of the following mineral does not contain Al ?


1589.

12. In which of the following the solubility of AgCl will be maximum? 1)0.1 M NaNO3 2)water 3)0.1 M NaCl 4)0.1 M NaBr

Answer» 12. In which of the following the solubility of AgCl will be maximum? 1)0.1 M NaNO3 2)water 3)0.1 M NaCl 4)0.1 M NaBr
1590.

A pressure cooker is based on the principle that boiling point of water increases with the_______.

Answer»

A pressure cooker is based on the principle that boiling point of water increases with the_______.


1591.

What are the postulates of the J J Thomson model?

Answer» What are the postulates of the J J Thomson model?
1592.

A compound possesses 8% sulphur by mass. The least molecular mass is

Answer»

A compound possesses 8% sulphur by mass. The least molecular mass is


1593.

which of the following compound exbit hyperconjugation AND reason A)phenol B)ethyne C)ethanol D)propene

Answer» which of the following compound exbit hyperconjugation AND reason A)phenol B)ethyne C)ethanol D)propene
1594.

Diffrentiate xcosx using 1st principle

Answer» Diffrentiate xcosx using 1st principle
1595.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −हिमस्खलन से कितने लोगों की मृत्यु हुई और कितने घायल हुए?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए


हिमस्खलन से कितने लोगों की मृत्यु हुई और कितने घायल हुए?

1596.

How does boiling point of liquid varies with pressure? explain

Answer»

How does boiling point of liquid varies with pressure? explain

1597.

Which of the following is false? Elasticity is the property of matter which ___

Answer» Which of the following is false? Elasticity is the property of matter which ___
1598.

5) 22.Find number of oxygen atoms present in 100 mgof CaCO3-(Atomic mass of Ca40 u, c12 u, O16 u)(1) 6.02 x 1023(2) 6.02 x 1020(3) 1.806 x 1021(4) 1.204 x 1020

Answer» 5) 22.Find number of oxygen atoms present in 100 mgof CaCO3-(Atomic mass of Ca40 u, c12 u, O16 u)(1) 6.02 x 1023(2) 6.02 x 1020(3) 1.806 x 1021(4) 1.204 x 1020
1599.

Calculate mass of pottasium sulphate to prepare it 10% (mass solution) in 100g of water? ​​​

Answer» Calculate mass of pottasium sulphate to prepare it 10% (mass solution) in 100g of water?
​​​
1600.

What is loga 1

Answer» What is loga 1