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(a) Magnesium Chloride 

(b) Mg(OH)₂ + 2HCl MgCl₂ + 2H₂O 

(c) H₂SO₄ (sulphuric acid)

 1. SO₂

 2. C

3.  Normal salt

 4. SO₂

5.Pb(NO₃)₂

Cone. Sulphuric acid is a dehydrating agent. 

Hydrogen chloride is acidic while quick lime is basic, so they react.

Because quick lime is basic in nature and combines with moist hydrogen chloride gas forming calcium chloride.

Hydrogen sulphide (H₂S)

The strength of an acid is the extent to which the acid ionizes or dissociates in water.

The strength of an acid depends on the degree of ionization and concentration of hydronium ions [H₃O⁺] produced by that acid in aqueous solution.

(1) B 

(2) D 

(3) C 

(4) A 

(5) A

In the given equation S + 2H₂SO₄ → 3SO₂ + 2H₂O:Oxidising agent 

(a) Hydrogen gas is evolved when ethanol reacts with sodium.

(b) Esters are formed when a carboxylic acid reacts with an alcohol in the presence of conc. H₂SO₄

(c) Dilute ethanoic acid turns universal indicator paper to orange, showing that its pH is about 4 which tell us that ethanoic acid is a weak acid. On the other hand, dilute hydrochloric acid turns universal indicator paper to red, showing that its pH is about 1. This shows us that hydrochloric acid is a strong acid.

1. B: Dehydrating agent 

2. D: Oxidising agent 

3. C: Non-volatile acid 

4. A: Dilute acid 

5. D: Oxidising agent

(a) 2NO₂ + H₂O ⟶ HNO₂ + HNO₃

(b) Two types of salts are produced when dibasic acid reacts with caustic soda. One is acidic salt and other normal salt.

Acid salts:

H2SO₄ + NaOH ⟶ NaHSO₄ + H₂O

Normal salts:

H₂SO₄ + 2NaOH ⟶ Na₂SO₄ + 2H₂O

(d) Assignment

(b) Relational

Operators is not a Keyword in Python

# is used to give comments in Python Program

Answer (a) >>>

(b) Guido Van Rossum

Ctrl + N is used to create new Python Program

(a) Interpreter

Comma(,) is used to print more than one item on a single line

In computer programming languages operators are special symbols which represent computations, conditional matching etc. The value of an operator used is called operands. Operators are categorized as Arithmetic, Relational, Logical, Assignment etc

Python breaks each logical line into a sequence of elementary lexical components known as Tokens. 

The normal token types are;

1. Identifiers

2. Keywords

3. Operators

4. Delimiters

5. Literals

White space separation is necessary between tokens, identifiers or keywords.

In Python, programs can be written in two ways namely Interactive mode and Script mode. The Interactive mode allows us to write codes in Python command prompt (>>>) whereas in script mode programs can be written and stored as separate file with the extension .py and executed. Script mode is used to create and edit python source file.

Ternary is also called as Conditional operator

An Exponent data contains decimal digit part, decimal point, exponent part followed by one or more digits. 

12.E04, 24.e04 # Exponent data

Literal is a raw data given in a variable or constant. In Python,

there are various types of literals.

1. Numeric

2. String

3. Boolean

Conditional operator:

Ternary operator is also known as conditional operator that evaluate something based on a condition being true or false. It simply allows testing a condition in a single line replacing the multiline if – else making the code compact.

The Syntax conditional operator is,

Variable Name = [on – true] if [Test expression] else [on – false]

Example:

min = 50 if 49 < 50 else 70 # min = 50 min = 50 if 49 > 50 else 70 # min = 70

(a) for, (b) \k, (c) true, (d) <>

String Literals:

In Python a string literal is a sequence of characters surrounded by quotes. Python supports single, double and triple quotes for a string. A character literal is a single character surrounded by single or double quotes. The value with triple – quote is used to give

multi – line string literal.

Strings = “This is Python”

char = “C

multiline _ str = “This is a multiline string with more than one line code”.

(i) Centrum Wiskunde & Information

(ii) Monthly Python’s Flying Circus

= is the simple assignment operator.

There are 3 many logical operators

(a) (i), (iii) are true

Integrated Development Learning Environment

Python language was released in the year 1991

:: is not a delimiter

(b) not a > b – Comparative Operator

Compound operators comes under the category of Assingnment operators.

There are 6 many comparative operators

Answer is (d) ! =

(c) ** = is a delimiter

(a) 12 Name,

(b) end, 

(c) while,

(d) =

\ is the escape character.

There are 3 types of literals

\r is the escape character for carriage return.

\n is the newline character

(d) Interpreter is ready to accept Instructions

The int ( ) function is used to convert string data as integer data explicitly.

(b) New file