Explanation

I am indebted to you for your help

میں آپ کی مدد کے لیے آپ کا مقروض ہوں۔

In the sentence the word "to" is used as a preposition to indicate the recipient of the indebtedness.

Explanation

An indehiscent integument megasporangium in the form of ovule is found in spermatophytes.

The ovule then forms the seed after fertilization

Explanation

He gives a lot of contributions to welfare societies

وہ فلاحی معاشروں میں بہت زیادہ تعاون کرتا ہے

In the sentence the word "to" is used as a preposition to indicate the target or recipient of the contributions. 

Explanation

The best synonym for "SELDOM" in the given sentence is rarely.

Seldom کبهی کبهار

Rarelyکبھی کبھی, مشکل سے

Explanation

The term "phosphatidylcholine" is sometimes used interchangeably with "lecithin," although the two are different.

Choline is a component of phosphatidylcholine, which is a component of lecithin.

Explanation

In 1935, the Tobacco mosaic virus (TMV) was crystallized by Wendell Meredith Stanley.

Stanley's work on TMV contributed significantly to the understanding of viruses

He earned him the Nobel Prize in Chemistry in 1946

Explanation

Basic lead chromate is formed when lead chromate (PbCrO4) is boiled with dilute alkali hydroxide.

Here's the reaction:

PbCrO4 +OH- → PbO⋅PbCrO4 +H2O

In this process, the lead chromate reacts with the dilute alkali hydroxide to form basic lead chromate.

The alkali hydroxide used is typically a dilute solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH).

Explanation

The equation of Bernoulli's theorem is not related to the turning of a musical instrument. 

Explanation

Filial Has Familial Origins.

Filial comes from the Latin filius, meaning "son," and filia, "daughter"

Explanation

The molecule that exhibits all three types of bonding—ionic, covalent, and coordinate covalent—is NH4Cl (ammonium chloride).

Ionic Bonding:

In NH4Cl, the bond between ammonium (NH4+) and chloride (Cl-) ions is primarily ionic.

Covalent Bonding:

Within the ammonium ion (NH4+), the bonds between nitrogen and hydrogen atoms are covalent.

Coordinate Covalent Bonding:

In NH4Cl, there is also a coordinate covalent bond between the ammonia (NH3) molecule and a proton (H+) from hydrochloric acid (HCl) that forms ammonium (NH4+)