The maximum prescribed concentration of copper in drinking water is

. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on above observation, the element present in the given compound is

An organic compound

A

is oxidised with

Na_{2} O_{2}

followed by boiling with

HNO_{3}

nitrogen
phosphorus
fluorine
sulphur

Topic:

Organic Chemistry-Some Basic Principles and Techniques

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

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The element having greatest difference between its first and second ionisation energy, is

$Ca$
$Sc$
$Ba$
$K$

Topic:

Classification of Elements and Periodicity in Properties

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View 5 solutions

What is the work function of the metal, if the light of wavelength

4000 \overset{˚}{A}

generates photoelectron of velocity

6 \times 1 0^{5} ms^{- 1}

from it? (Mass of electron

= 9 \times 1 0^{- 31} kg

Velocity of light

= 3 \times 1 0^{8} ms^{- 1}

Planck's constant

= 6.626 \times 1 0^{- 34} J_{S}

Charge of electron

= 1.6 \times 1 0^{- 19} JeV^{- 1}

)

$4.0 eV$
$2.1 eV$
$0.9 eV$
$3.1 eV$

Topic:

Structure of Atom

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View 25 solutions

The relative stability of

+ 1

oxidation state of group 13 elements follows the order

$Al < Ga < Tl < In$
$Al < Ga < In < Tl$
$Tl < In < Ga < Al$
Ga $<$ Al $<$ In $<$ Tl

Topic:

The p-Block Elements

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View 2 solutions

Practice questions from Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Water filled in two glasses

A

and

B

have BOD values of 10 and 20 , respectively. The correct statement regarding them, is

$A$ is more polluted than $B$
$A$ is suitable for drinking, wherease $B$ is not
Both $A$ and $B$ are suitable for drinking
$B$ is more polluted than $A$

Topic:

Environmental Chemistry

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View 2 solutions

Which of the following is not involved in the formation of photochemical smog?

$NO$
$O_{3}$
$C_{x} H_{y}$
$SO_{2}$

Topic:

Environmental Chemistry

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2002

View 2 solutions

of rain water, is approximately

The

pH

$7.5$
$6.5$
$5.6$
$7.0$

Topic:

Environmental Chemistry

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View 2 solutions

The condition for methemoglobinemia by drinking water is

$> 50 ppm$ nitrate
$> 50 ppm$ chloride
$> 50 ppm$ lead
$> 100 ppm$ sulphate

Topic:

Environmental Chemistry

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

View solution

Practice questions from Environmental Chemistry in the same exam

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Photochemical smog causes cracking of rubber.
Reason (R) : Presence of ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate in photochemical smog makes it oxidizing.
Choose the most appropriate answer from the options given below:

(A) is false but (R) is true
Both (A) and (R) are true but (R) is not the true explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are true and (R) is the true explanation of (A)

Topic:

Environmental Chemistry

Exam:

JEE Mains 2021 Aug 26 Shift 2

View solution

Green Chemistry in day-to-day life is in the use of :

Liquified $CO_{2}$ for dry cleaning of clothes
Large amount of water alone for washing clothes
Tetrachloroethene for laundry
Chlorine for bleaching of paper

Topic:

Environmental Chemistry

Exam:

JEE Mains 2021 July 20 Shift 1

View solution

Given below are two statements :
Statement I : The pH of rain water is normally ~5.6.
Statement II : If the pH of rain water drops below 5.6, it is called acid rain.
In the light of the above statements, choose the correct answer from the options given below :

Both Statement I and Statement II are false.
Statement I is false but Statement II is true.
Both Statement I and Statement II are true.
Statement I is true but Statement II is false.

Topic:

Environmental Chemistry

Exam:

JEE Mains 2021 Feb 25 Shift 2

View solution

Practice more questions from Environmental Chemistry

DDT and BHC may act as:

Allergens
Carcinogens
Asthematic agents
None of these

Topic:

Environmental Chemistry

View solution

The compound that is NOT a common component of photochemical smog is :

$O_{3}$
$CH_{2} = CHCHO$
$CF_{2} Cl_{2}$

Topic:

Environmental Chemistry

View solution

The compound responsible for depletion of ozone layer is

Methyl chloroform
Carbon tetrachloride
Both (a) and (b)
None of these

Topic:

Environmental Chemistry

View 2 solutions

Aerosol particles of oxides or ammonium salts in rain drops results in :

Wet-deposition
Dry-deposition
Both A & B
None of the above

Topic:

Environmental Chemistry

View 2 solutions

Practice questions on similar concepts asked by Filo students

1.1 Introduction : Chemistry is the study of 1.2.1. Matter : You have learnt earlier that matter, its physical and chemical properties matter occupies space and has mass. Matter and the physical and chemical changes it can be further classified into pure substances undergoes under different conditions. and mixtures on the basis of chemical composition. Chemistry is a central science. Its Let us understand first what are pure knowledge is required in the studies of physics, substances and mixtures. biological sciences, applied sciences, and earth 1.2.2 Pure substances versus mixtures? in every aspect of life, for example, the air we composition. The substances have a definite chemical breathe, the food we eat, the fluids we drink, composition. They always have the same our clothing, transportation and fuel supplies, properties regardless of their origin. Mixtures and so on. Though it is an ancient science, due to hence no definite properties. development and advancement in science Examples of pure substances : Pure metal, and technology, chemistry has developed as distilled water, etc. in sophisticated instruments expanded our pigment, additive), concrete (a mixture of knowledge of chemistry which, now, has been sand, cement, water) used in applied sciences such as medicine, dentistry, engineering, agriculture and in daily of carbon. Inorganic chemistry is the study of all substances which are not organic. Physical chemistry is the study of principles underlying Pure substances are further divided into chemistry. It deals with the studies of properties elements and compounds. Elements are of matter. It is study of atoms, molecules, and pure substances which can not be broken fundamental concepts related to electrons, down into simpler substances by ordinary energies and dynamics therein. It provides chemical changes. Elements are further basic framework for all the other branches of classified as metals, nonmetals and metalloids. chemistry. 1

Topic:

Solid State

View solution

Find div

F

and

curl F

F (x, y, z) = x z^{3} i + 2 y^{4} x^{2} j + 5 z^{2} y k

Topic:

Chemistry

View solution

What products would you expcct from the following reactions?(a)(b)

(CH_{3})_{2} CHCH_{2} CH = CHCH_{3} + CH_{2} I_{2} ⟶ Zn (Cu)

Topic:

Chemistry

View solution