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Which of the following compounds is formed when sodium burns in excess of air?
NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:
The lower part of the “Solvay tower” has been cooled during the manufacture of soda ash because:
NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Magnesium oxide is used in:
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
What is the chemical formula for plaster of Paris?
NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:
Sodium Is prepared by
Which one of the following statements is true?
NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:
Melting point of Group I-A elements is than Group II-A elements
When alkali metal react with water the fire Is produced clue to:
By heating 25g of limestone (CaCO3) , the weight of carbon dioxide produced is
NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:
Most abundant salt of sodium in nature is:
NTS 2017
Chemistry
s and p Block Elements
Elimination Tool:
Magnesium reacts with nitrogen to form:
PMC 2020
Chemistry
s and p Block Elements
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Hydrides which are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals are called:
NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:
Only two elements are present in:
NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:
Color of Epsom salt Is
Aqueous solution of Na2CO3is:
NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:
Sodium reacts with water more vigorously than lithium because it:
NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following is not true about caustic soda? a) It causes painful burns c) It is manufactured by Costner—Kellner process e) Both b and d
Red lead is:
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Metals belonging to the same group in the periodic table are
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
When Gypsum is heated to about 100° C, it losses some water of crystallization and becomes:
NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
s and p Block Elements
Elimination Tool:
The basic character of alkali metal oxides:
The carbonates of alkali metals are soluble in water except:
NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:
Which is the paramagnetic oxide of chlorine?
NUMS 2019 Reconduct
Chemistry
s and p Block Elements
Elimination Tool:
Caster kellners cell evaporated has replaced __________ because the Caster Kellner process evaporates__________?
NTS 2015 SMBBMC
Chemistry
s and p Block Elements
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Which of the following is a major mineral of Lithium?
Li is an element of group?
The false statement regarding saline hydrides is:
NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Pierrie Curie and Marie Curie isolated which radioactive element?
NTS 2015 SMBBMC
Biology
s and p Block Elements
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Which ions shall be removed to make hard water soft?
NUMS 2019 Cancelled
Chemistry
s and p Block Elements
Elimination Tool:
Group 1A and 11A are known as: ) s block elements d) P block elements
Commercial hydrogen is obtained from:
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
Potassium, Rubidium, Cesium react with oxygen to form which types of oxides?
PMC 2020
Chemistry
s and p Block Elements
Elimination Tool:
Which one of the following is a common mineral of calcium? a
Which of the following do not occur in Free State?
Which of the following is the correct order of electronegativity (from highest to lowest)?
NTS 2015 SMBBMC
Biology
s and p Block Elements
Chemical Bonding
Elimination Tool:
Which of the following elements has the highest boiling point?
NTS 2014
Chemistry
s and p Block Elements
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7) Gypsum supplies to soil
Which alkaline earth metal make peroxide?
NUMS 2019 Reconduct
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following is least polarizable?
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Chlorine upon reaction in cold NaOH yields:
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following has the highest value of electronegativity?
PMC 2020
Chemistry
s and p Block Elements
Chemical Bonding
Elimination Tool:
The nitrides of alkaline earth metals hydrolyse with water to form:
NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following is chrome yellow’s pigment?
NTS 2015 SMBBMC
Chemistry
s and p Block Elements
Elimination Tool:
Which property of the Group II elements (magnesium to barium) and their compounds increases with an increasing proton (atomic) number?
NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:
What is the chemical formula of Epsom Salt?
Which of the following is unstable?
Strontium lies between calcium and barium in Group II A in the Periodic Table. Which of the properties could be predicted for strontium?
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following statements about H2S is false:
NTS 2010
Chemistry
s and p Block Elements
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Rocky crust of earth is mainly composed of?
To avoid the formation of toxic compounds with chlorine, which substance is used for disinfecting water?
NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:
Magnesiums keep on burning in:
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Identify the correct statement:
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Nascent hydrogen used in the formation of methane is obtained from the reaction of:
NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:
The ionization of Hydrogen atom gives:
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
For Alkali Metals, decrease in the ionization potential is because of the increasing:
Which one of the following alkaline earth metal carbonates is thermally the most stable?
NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:
________ are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals?
NTS 2015 SMBBMC
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following oxides is most acidic oxide?
NUMS 2019 Reconduct
Chemistry
s and p Block Elements
Elimination Tool:
Oxygen does not react with:
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
The chemical name of the baking powder is:
NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:
The flame colour of Ca in flame test is:
NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:
Which of the following statements is true?
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
The most dense element is:
NTS 2013
Chemistry
s and p Block Elements
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Which is most basic in character?
NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:
Densities of alkali metals are low due to:
PMC 2020
Chemistry
s and p Block Elements
Elimination Tool:
Which one of these reacts rapidly with water at room temperature?
Point out the property which is not characteristic of alkali metal:
NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:
Formula of Epsom salt is:
