Recent questions tagged science

Identify the wrong statement in the following

asked Sep 12, 2017 by meena.p

1 answer

The main buffer system of the human blood is

asked Sep 12, 2017 by meena.p

1 answer

What kind of element would you find on the far left-hand side of the periodic table?

asked Sep 12, 2017 by meena.p

1 answer

Which one of the following depicts the correct representation of atomic radius(r) of an atom ?

asked Sep 12, 2017 by meena.p

1 answer

Vinegar is a solution of

asked Sep 12, 2017 by meena.p

1 answer

The manufacture of bread, beer and wine involves alcoholic fermentation of glucose to ethanol by yeast. Which of the following five statements concerning this process are correct? I. Yeast carries out fermentation because yeast cells lack mitochondria. II. For every molecule of ethanol produced, one molecule of co1 evolves. III. For every one molecule of glucose fermented, net two molecules of ATP are generated. I V. More than 80% of the chemical energy of the glucose is released as heat. (V) Glycolysis is an integral part of this fermentation.

asked Sep 12, 2017 by meena.p

1 answer

By which Reaction metal is obtained from metal oxide

asked Sep 12, 2017 by meena.p

1 answer

Raw materials for production of urea are

asked Sep 12, 2017 by meena.p

1 answer

What happens when calcium is treated with water?

asked Sep 12, 2017 by meena.p

1 answer

Which has triple bond ?

asked Sep 12, 2017 by meena.p

1 answer

When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water , the reaction $SO_2+2H_2S \to 2H_2O +3S$ Occurs. Here Hydrogen sulphide is acting as

asked Sep 12, 2017 by meena.p

1 answer

Red color of tomatoes is due to alkene named

asked Sep 11, 2017 by meena.p

1 answer

Layer which protects earth from being hit by meteoroids is

asked Sep 11, 2017 by meena.p

1 answer

Which of the following is not the necessary condition for rusting

asked Sep 11, 2017 by meena.p

1 answer

Reactions in which reactants react to form products and simultaneously products reverse back in to reactants are called

asked Sep 11, 2017 by meena.p

1 answer

Arrange the following elements in the order of their decreasing metallic character: $Na, Si, Cl, Mg, Al$

asked Sep 11, 2017 by meena.p

1 answer

Which of the following are correct structural isomers of butane?

asked Sep 11, 2017 by meena.p

0 answers

Which of the following metals does not displace $H_2$ gas from dilute $HCl$ or dilute $H_2SO_4$?

asked Sep 11, 2017 by meena.p

1 answer

Vitamin which helps in chemical transmission of images from eye to brain is

asked Sep 11, 2017 by meena.p

1 answer

Which one of the following metal reacts vigorously with oxygen and water?

asked Sep 11, 2017 by meena.p

1 answer

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? i. Good thermal conductivity ii. Good electrical conductivity iii. Ductility iv. High melting point

asked Sep 11, 2017 by meena.p

1 answer

A student takes some zinc granules in a test tube and adds dil. HCl to it. He would observe that the colour of the zinc granules changes to :

asked Sep 11, 2017 by meena.p

1 answer

Reaction of halogens (Group-VII) and alkane (saturated hydrocarbons) in presence of sunlight is an example of

asked Sep 11, 2017 by meena.p

1 answer

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

asked Sep 11, 2017 by meena.p

1 answer

When a metal replaces hydrogen atom then compound form is

asked Sep 11, 2017 by meena.p

1 answer

When copper oxide is heated with hydrogen, copper metal and water are formed. Which of the following is oxidising agent in this reaction?

asked Sep 11, 2017 by meena.p

1 answer

Which of the following actions increases the rate of dissolving?

asked Sep 11, 2017 by meena.p

1 answer

Air contains 78 percent nitrogen, 21 percent oxygen, and one percent argon. Which gas is the solvent?

asked Sep 11, 2017 by meena.p

1 answer

On increasing temperature of amorphous solid they

asked Sep 11, 2017 by meena.p

1 answer

What is the volume of Object X?

asked Sep 11, 2017 by meena.p

1 answer

If an object has a density of $3.6 g/mL $ and you put it into water, will it sink or float?

asked Sep 8, 2017 by meena.p

1 answer

The balancing of chemical equations is in accordance with:

asked Sep 8, 2017 by meena.p

1 answer

The charge/ mass ratio of electron:

asked Sep 8, 2017 by meena.p

1 answer

Dry ice on heating produces:

asked Sep 8, 2017 by meena.p

1 answer

A student is pouring equal amounts of water, maple syrup, and cooking oil into a glass beaker and looking at how the layers settle. Which property of the liquids is the student most likely comparing?

asked Sep 8, 2017 by meena.p

1 answer

Why does an atom have no net electric charge?

asked Sep 8, 2017 by meena.p

1 answer

The formula of ethanol is $C_2H_5 – OH$. What will be its molecular mass?

asked Sep 8, 2017 by meena.p

1 answer

The atomic number of sodium is 11 and its mass number is 23. It has

asked Sep 8, 2017 by meena.p

1 answer

Brass is a solution of molten copper in

asked Sep 8, 2017 by meena.p

1 answer

Which of the following compounds when dissolved in water gives coloured solution ?

asked Sep 7, 2017 by meena.p

1 answer

The number of electrons presents in $H^+$ is

asked Sep 7, 2017 by meena.p

1 answer

The major constituent of air is

asked Sep 7, 2017 by meena.p

1 answer

In sugar solution,

asked Sep 7, 2017 by meena.p

1 answer

As compared to beryllium, magnesium is

asked Sep 7, 2017 by meena.p

1 answer

The gas used for artificial ripening of green fruit is

asked Sep 7, 2017 by meena.p

1 answer

The material which can be deformed permanently by heat and pressure is called a

asked Sep 7, 2017 by meena.p

1 answer

The isotope deuterium of hydrogen has

asked Sep 7, 2017 by meena.p

1 answer

Elements with more than 1 energy level will lose, gain or share electrons until they have _____________ valence electrons.

asked Sep 7, 2017 by meena.p

1 answer

Batman and Robin were studying physical and chemical properties of matter. They determined that the mass of a sample was 50 grams. Which sentence best states how mass describes matter?

asked Sep 7, 2017 by meena.p

1 answer

In solutions particles are

asked Sep 7, 2017 by meena.p

1 answer

Ask Questions, Get Answers