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## Total number of atoms represented by the compound CuS04.5H20

In CuSO4.5H2O, we have: 1 Copper (Cu) atom, 1 Sulphur (S) atom, 4 Oxygen (O) atoms, 5*2 = 10 Hydrogen (H) atoms, and 5*1 = 5 Oxygen (O) atoms. Thus, in total, the number of atoms present in the compound is: 1+1+4+10+5 = 21.

In CuSO4.5H

_{2}O, we have:1 Copper (Cu) atom,

1 Sulphur (S) atom,

4 Oxygen (O) atoms,

5*2 = 10 Hydrogen (H) atoms,

and 5*1 = 5 Oxygen (O) atoms.

Thus, in total, the number of atoms present in the compound is: 1+1+4+10+5 = 21.

See less## Match the scientist’s name with the contribution/discovery.

The scientists' name have been correctly matched with their contributions/discoveries below: (i) Faraday → (g) Law of electromagnetic induction (ii) Rutherford → (j) Nuclear model of atom (iii) Chadwick → (i) Neutron (iv) Bohr → (b) Quantum model of hydrogen atom (v) Newton → (a) Law of gravitation,Read more

The scientists’ name have been correctly matched with their contributions/discoveries below:

(i) Faraday → (g) Law of electromagnetic induction

(ii) Rutherford → (j) Nuclear model of atom

(iii) Chadwick → (i) Neutron

(iv) Bohr → (b) Quantum model of hydrogen atom

(v) Newton → (a) Law of gravitation, Laws of motion

(vi) Maxwell → (c) Unification of light and electromagnetism

(vii) Salam → (f) Unification of weak and electromagnetic interactions

(viii) Einstein → (h) Theory of relativity, Explanation of photoelectric effect

(ix) Roentgen → (e) X-rays

(x) Madam Curie → (n) Discovery of radium

(xi) J. J. Thomson → (m) Electron

(xii) de Broglie → (k) Wave nature of matter

(xiii) John Bardeen → (l) Transistor

(xiv) Hubble → (h) Expansion of the universe

(i ) – (g); (ii) – (j); (iii) – (i); (iv) – (b); (v) – (a); (vi) – (c); (vii) – (f); (viii) – (d); (ix) – (e); (x) – (n); (xi) – (m); (xii) – (k); (xiii) – (l); (xiv) – (h).

See less## If x mod 3 = 1 and x mod 7 = 4. Which of the following is (are) possible values for x?

The correct answers are 25 and 67. This is because: 25 divided by 3 leaves a remainder of 1 25 divided by 7 leaves a remainder of 4 67 divided by 3 leaves a remainder of 1 67 divided by 7 leaves a remainder of 4

The correct answers are 25 and 67.

This is because:

25 divided by 3 leaves a remainder of 1

See less25 divided by 7 leaves a remainder of 4

67 divided by 3 leaves a remainder of 1

67 divided by 7 leaves a remainder of 4

## Suppose Sheetal’s birthday is on the Pth of October and Karthik’s birthday is on the Qth of November, where P and Q are perfect squares. If Sheetal was born 10 days before Karthik, then the value of P−2Q will be?

The answer is 17 (Seventeen). Explanation: It's given that - P is a date in the month of October Q is a date in the month of November. P and Q both are perfect squares. Perfect squares are numbers whose square root is a natural number, including 0. The available dates in October that are perfect numRead more

The answer is 17 (Seventeen).

Explanation:

It’s given that –

P is a date in the month of October

Q is a date in the month of November.

P and Q both are perfect squares.

Perfect squares are numbers whose square root is a natural number, including 0.

The available dates in October that are perfect numbers are:

1*1 = 1st October

2*2 = 4th October

3*3 = 9th October

4*4 = 16th October, and

5*5 = 25th October

It’s mentioned that Pth October and Qth November are only 10 days apart.

As all the perfect square dates before 25th October do not occur 10 days before any date of November, the only choice we’re left with is 25th October.

10 days after 25th October comes 4th November.

here, both 25 and 4 are perfect squares.

thus, P = 25 and Q = 4.

Now, P – 2Q = 25 – 2(4) = 25 – 8 = 17 (Required Answer).

See less## Arrange these metals in their increasing order of reducing power.

Ag+|Ag, Hg2+|Hg, Cr3+|Cr, Mg2+|Mg, K+|K

Ag

See less^{+}|Ag, Hg^{2+}|Hg, Cr^{3+}|Cr, Mg^{2+}|Mg, K^{+}|K## Arrange the following metals in the order in which they displace each other from the solution of their salts

The correct order is as follows: Mg, Al, Zn, Fe, Cu.

The correct order is as follows:

Mg, Al, Zn, Fe, Cu.

See less## State the function of interferons.

Interferons are low molecular weight proteins produced by virus infected cells. They protect non-infected cells from further infections.

Interferons are low molecular weight proteins produced by virus infected cells. They protect non-infected cells from further infections.

See less## How do cytokine barriers provide innate immunity in humans?

Virus infected cells secrete proteins called interferons which non-infected cells from further viral infection.

Virus infected cells secrete proteins called interferons which non-infected cells from further viral infection.

See less## Name two diseases whose spread can be controlled by the eradication of Aedes mosquitoes.

Chikungunya and Dengue Fever are two diseases that can be controlled by eradication of Aedes Mosquito.

Chikungunya and Dengue Fever are two diseases that can be controlled by eradication of Aedes Mosquito.

See less## Suggest the method to ensure an anamnestic response in humans.

To ensure anamnestic or secondary immune response, dead or attenuated pathogens of a disease can be injected into a healthy person that can produce memory cells i.e., vaccination.

To ensure anamnestic or secondary immune response, dead or attenuated pathogens of a disease can be injected into a healthy person that can produce memory cells i.e., vaccination.

See less