Tahsili SAAT (Saudi Arabia) · Chemistry

Atomic Structure, Bonding, Reactions and Organic Chemistry

31 practice questions, each with the answer and an explanation.

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What is the ground-state electron configuration of a neutral iron atom ( $_{26} Fe$ )?
Which of the following elements has the highest electronegativity value on the Pauling scale?
What is the geometric molecular shape of a water molecule ( $H_{2} O$ ) predicted by VSEPR theory?
According to Le Chatelier's principle, what will happen to the equilibrium of the exothermic synthesis of ammonia: $N_{2} (g) + 3 H_{2} (g) ⇌ 2 NH_{3} (g) + Heat$ if…
What is the pH of a $0.001 M$ aqueous solution of hydrochloric acid ( $HCl$ ), assuming complete dissociation?
What is the oxidation state of sulfur in the sulfate ion ( $SO_{4}^{2 -}$ )?
According to the ideal gas law ( $P V = n R T$ ), what happens to the pressure of an ideal gas if its volume is halved while the absolute temperature is kept constant?
Which functional group characterizes alcohols in organic chemistry?
What is the molar mass of calcium carbonate ( $CaCO_{3}$ )? (Atomic masses: $Ca = 40, C = 12, O = 16$ )
Which of the following bonds is the most polar covalent bond?
What is the IUPAC name of the hydrocarbon with the structural formula $CH_{3} - CH_{2} - CH_{2} - CH_{3}$ ?
How many moles of gas are present in a sample that occupies $44.8 L$ at Standard Temperature and Pressure (STP)?
In a galvanic (voltaic) electrochemical cell, at which electrode does oxidation occur?
What is the conjugate base of the Brønsted-Lowry acid $H_{2} SO_{4}$ ?
Which factor does NOT increase the rate of a chemical reaction?
What type of intermolecular force is responsible for the exceptionally high boiling point of water relative to hydrogen sulfide ( $H_{2} S$ )?
What is the change in enthalpy ( $Δ H$ ) for an endothermic reaction?
What is the maximum number of electrons that can occupy a $d$ subshell?
Which of the following compounds exhibits ionic bonding?
What is the catalyst used in the commercial Haber-Bosch process for ammonia synthesis?
What is the term for elements in Group 18 of the periodic table?
What is the product of the reaction between an acid and a base in a neutralization reaction?
Which of the following organic compounds is an ester?
What is the molarity of a solution containing $0.5 moles$ of sodium hydroxide dissolved in $250 mL$ of aqueous solution?
According to Hund's rule, how do electrons fill degenerate orbitals of equal energy within a subshell?
What is the oxidation number of oxygen in hydrogen peroxide ( $H_{2} O_{2}$ )?
In the reaction $2 Al + 3 Cl_{2} \to 2 AlCl_{3}$ , if $5.4 g$ of $Al$ ( $27 g/mol$ ) reacts with $21.3 g$ of $Cl_{2}$ ( $71 g/mol$ ), what mass of…
For the gaseous reaction $H_{2} + I_{2} ⇌ 2 HI$ with $K_{c} = 64$ at $45 0^{\circ} C$ , if initial $[H_{2}] = [I_{2}] = 1.0 M$ , what is the equilibriu…
What is the pH of a buffer solution containing $0.20 M$ acetic acid ( $CH_{3} COOH$ , $K_{a} = 1.8 \times 1 0^{- 5}, p K_{a} \approx 4.74$ ) and $0.20 M$ sodium acetate (…
For a standard galvanic cell with $Zn^{2 +} / Zn$ ( $E^{\circ} = - 0.76 V$ ) and $Cu^{2 +} / Cu$ ( $E^{\circ} = + 0.34 V$ ), what is the standard cell potential…
What is the primary organic product when 1-propanol undergoes controlled oxidation with pyridinium chlorochromate (PCC) in anhydrous dichloromethane?

Atomic Structure, Bonding, Reactions and Organic Chemistry

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