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A Lady Gives A Dinner Party For Six Guests The Number Of Ways In Which They May Be Selected From Among Ten Friends

1) 112 2) 140 3) 164 4) None of these Answer: (2) 140 Solution: Number of guest = 6 Total friends = 10 Selection of 6 guest from ten... View Article

Different Words With The Letters Of The Word Integer Let M1 Be The Number Of Words In Which I And N Are Never Together

1) 30 2) 60 3) 90 4) 180 Answer: (1) 30 Solution: Given, the word INTEGER Total letters = 7 Total number of words that can be formed =... View Article

Number Of Ways In Which The Following Prizes Will Be Given To A Class Of 20 Boys First And Second Mathematics

1) 204 × 192 2) 203 × 193 3) 202 × 194 4) None of these Answer: (1) 204 × 192 Solution: Given, there are 20 boys in a class Total... View Article

The Number Of Triangles Which Can Be Formed By Using The Vertices Of A Regular Polygon Of N 3 Sides Is 220 Then N

1) 8 2) 9 3) 10 4) 11 Answer: (2) 9 Solution: Number of triangle formed with n+3 sides = n+3C3 Given, n+3C3 = 220 (n+3)!/(3!.n!) = 220... View Article

There Are 10 Lamps In A Hall Each One Of Them Can Be Switched On Independentlythe Number Of Ways

1) 102 2) 1023 3) 210 4) 10! Answer: (2) 1023 Solution: A lamp has two choices On or Off If more than one lamp is ON then Room is... View Article

A Committee Of 12 Is To Be Formed From 9 Women And 8 Men In Which At Least 5 Women Have To Be Included

1) 4784,1008 2) 2702,3360 3) 6062,2702 4) 2702,1008 Answer: (4) 2702,1008 Solution: As per the given question, there are 9 women and 8... View Article

Is O3 Diamagnetic In Nature

The ozone is diamagnetic, because all of its electrons are paired. O2, by comparison, is paramagnetic, containing two electrons that are... View Article

Is An Enzyme Always A Protein

Enzymes are categorised according to the form of reaction catalysed into six categories: Structurally, proteins represent the vast majority of... View Article

What Makes Good Electrophile

A polar aprotic solvent does not substantially bind hydrogen to nucleophiles, which means that the nucleophiles have greater solution... View Article

In Which Block Non Metals Are Found

Non-metals are found in the p−block of the modern periodic table. Non-metals are elements that, by accepting or receiving electrons, form... View Article

Which Ion Has Higher Polarising Power

The capacity of a cation to distort an anion is known as its polarisation power, and its polarizability is known as the tendency of the anion to... View Article

Why Is Aqua Regia Called Royal Water

Aqua Regia is a nitrohydrochloric acid solution. A 3:1 combination of hydrochloric acid and nitric acid, respectively, comprises the standard... View Article

What Is Positive And Negative Deviation From Raoults Law

Positive deviation from the law of Raoult means that the vapour pressure observed is greater than predicted and occurs when the attractions of... View Article

Why Hydrogen Ions Cannot Exist Alone

If an electron loses a hydrogen atom, the nucleus (H+) results in a size of 1.5 x 10-3 pm, which is very small relative to standard atomic or... View Article

Can We Use Potassium In Place Of Sodium In Lassaignes Test

Halogens form sodium halide by fusion with sodium metal in an organic compound. Potassium can, technically, be used in place of sodium. However,... View Article

Why Do Orbitals Hybridize

As hybridised orbitals are lower in energy compared to their separate, unhybridized counterparts, the hybridization of orbitals is also greatly... View Article

Is Sodium Acidic Or Alkaline

Elemental sodium has a low melting point and is a soft reactive metal. Sodium is the most notable of all the alkaline metals from a commercial... View Article

Is Ammonia A Strong Alkali

Ammonia is a weak base since there is an electron pair in the nitrogen atom that readily embraces a proton. Often, ammonia acquires hydrogen ions... View Article

What Are Two Types Of Bonds

There are two primary kinds of chemical bonds that keep together atoms: covalent and electrovalent/ionic bonds. Covalent bonds have atoms which... View Article

Is Hcl A Hydrogen Bond

A polar covalent bond occurs when electrons are exchanged in a covalent bond by atoms with different electronegativities. Find the molecule... View Article