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 [Al(H2O)6]³⁺ + H2O ⇋ [Al(H2O)5(OH)]²⁺ + H3O⁺ 
K_a ~10^-5 [1] cf acetic acid 
The OH^- is bound as a ligand to the Al³⁺ cation thus the complex has an overall charge of 2+. 
So, The conjugate base is [Al(H2O)5(OH)]²⁺ 

Less than 7  is the pH value of acidic solution. 

Magnesium is found in Chlorophyll. 

The general formula of alkane is C_nH_2n+2 

‘Kulh’ is a local canal irrigation system present in Himachal Pradesh state.

None of above

KOH is not acid. 

Papaya is an example of unisexual flower.

The ratio of atomic numbers of hydrogen and oxygen in water is 2 : 1.

Respiration and photosynthesis biochemical reaction in atmosphere to maintain balance between O₂ and CO₂

290 k is melting point of acetic acid.

He is an element of group zero.

In flower male reproductive organ is Androecium. 

In any ecosystem biological factors are plants, animals, human being & micro organism.

Mg is not alkali metal.

4 is the valency of Carbon.

In human dialysis pouch is Nephron. 

AIDS is sexually transmitted disease.

General formula of Alkyne is C_nH_2n-2

The approx number of carbon compounds is 3 million.

Darwin wrote the book ‘The Origin of Species’ 

VIth period has maximum number of element. 

Hormone secreted by Endocrine gland. 

Negative ions are formed by non metals as they are electronegative in nature so 

i) the non-metals are found on right side of the periodic table

ii) the element forming negative ions are also found in right side.
iii) the higher melting points are found in left side of the table and at the bottom of the groups.
iv) the elements forming positive ions are metals and they are found in left and middle of the periodic table.

Graphite non-metal is conductor of electricity. 

(i) Lithium (Li), sodium (Na), and potassium (K) have a single electron in their outermost shells. 
(ii) Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells. 
(iii) Neon (Ne), argon (Ar), and xenon (Xe) have filled outermost shells.
(iv) The halogen elements are fluorine (F), chlorine(Cl), bromine (Br)
(v) Carbon

CaCO₃ → CaO + CO₂ 

Decomposition is chemical reaction.

C₁₂H₂₂O₁₁ is the chemical formula of sugar.

The chemical properties of an atom are largely determined by its valence electrons. In a given group, the number of valence electrons are same, hence they have similar properties.

The compound take part in chemical reaction is called Reactant. 

–CHO functional group is called Aldehyde.

Plant waste material stored in leaves, bark and cellular vacuoles. 

Atomic number of Iron is 26.

pH = 3  is acidic.

Plant waste material stored in Leaves, Bark and Cellular vacuoles.

H₂ + Cl₂ → 2HCl 

chemical reaction is balanced.

Graphite is good conductor of electricity.

Na₂CO₃ compound of sodium is used to convert hard water into soft water.

An integer programming problem is a linear programming problem in which decision variables are further constrained to take integer values.

The most commonly used method for solving an IP is the method of branch-and-bound.

NH₃ compound formed after breakdown of amino acid.

Graphite non-metal is good conductor of electricity.

The removal of oxygen from a substance is called reduction.

In the periodic table when we go down the group the metallic character of element increases.

7 is the pH value of water.

–COOH functional group is called acid. 

Inactive type of element is Helium.

Eighteen groups are there in periodic table.

Sodium Carbonate decahydrate, Na₂CO₃.10H₂O

Simplifying

(2d² + 3d + 4) * y = x² + -2x

Reorder the terms:

(4 + 3d + 2d²) * y = x² + -2x

Reorder the terms for easier multiplication:

y(4 + 3d + 2d²) = x² + -2x

(4 * y + 3d * y + 2d² * y) = x² + -2x

Reorder the terms:

(3dy + 2d²y + 4y) = x² + -2x

(3dy + 2d²y + 4y) = x² + -2x

Reorder the terms:

3dy + 2d²y + 4y = -2x + x²

Solving

3dy + 2d²y + 4y = -2x + x²

Solving for variable 'd'.

Reorder the terms:

3dy + 2d²y + 2x + -1x² + 4y = -2x + x² + 2x + -1x²

Reorder the terms:

3dy + 2d²y + 2x + -1x² + 4y = -2x + 2x + x² + -1x²

Combine like terms: -2x + 2x = 0

3dy + 2d²y + 2x + -1x² + 4y = 0 + x² + -1x²

3dy + 2d²y + 2x + -1x² + 4y = x² + -1x²

Combine like terms: x² + -1x² = 0

3dy + 2d²y + 2x + -1x² + 4y = 0

The solution to this equation could not be determined.

a) Change in chemical properties 

It does not occur due to the presence of the same functional group.